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Contents Wiring diagrams Section: Exterior Lights All sections

Lighting System Chevrolet Camaro V

Exterior Lights 38 illustrations ~29849 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Brake Pedal Position Sensor Bolt9 N.m80 lb in
Headlamp Capsule Bolt2.5 N.m22 lb in
Overhead Console Reading Lamp Screw2 N.m18 lb in
Tail Lamp to the Body Panel Nut2.5 N.m22 lb in

Scheme 1

Scheme 1: Headlight Wiring Schematics
Scheme 1: Headlight Wiring Schematics

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4: Fog Lights Wiring Schematic
Scheme 4: Fog Lights Wiring Schematic

Scheme 5

Scheme 5: Exterior Lights Wiring Schematics
Scheme 5: Exterior Lights Wiring Schematics

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9: Interior Lights Wiring Schematic
Scheme 9: Interior Lights Wiring Schematic

Scheme 10

Scheme 10: Interior Lights Dimming Wiring Schematic
Scheme 10: Interior Lights Dimming Wiring Schematic

DIAGNOSTIC CODE INDEX

DTCDescription
DTC B2530B2530 01: Front Fog Lamps Control Circuit Short to Battery B2530 02: Front Fog Lamps Control Circuit Short to Ground B2530 04: Front Fog Lamps Control Circuit Open
DTC B2545B2545 01: Backup Lamps Control Circuit Short to Battery B2545 02: Backup Lamps Control Circuit Short to Ground B2545 04: Backup Lamps Control Circuit Open
DTC B255DB255D 02: Passenger Compartment Lamp Control 2 Circuit Short to Ground
DTC B2560B2560 01: Cargo Lamp Control Circuit Short to Battery B2560 02: Cargo Lamp Control Circuit Short to Ground B2560 04: Cargo Lamp Control Circuit Open
DTC B2575 or B2699B2575 01: Headlamps Control Circuit Short to Battery B2575 02: Headlamps Control Circuit Short to Ground B2575 04: Headlamps Control Circuit Open B2699 01: Right Headlamp Control Circuit Short to Battery B2699 02: Right Headlamp Control Circuit Short to Ground B2699 04: Right Headlamp Control Circuit Open
DTC B257AB257A 00: Headlamp Switch Input Signals Mismatch
DTC B257BB257B 03: Lighting Control Switch Signal Low Voltage B257B 07: Lighting Control Switch Signal High Voltage
DTC B2580B2580 01: Headlamp High Beam Control Circuit Short to Battery B2580 02: Headlamp High Beam Control Circuit Short to Ground B2580 04: Headlamp High Beam Control Circuit Open
DTC B2585 or B3867B2585 01: Left Park Lamps Control Circuit Short to Battery B2585 02: Left Park Lamps Control Circuit Short to Ground B2585 04: Left Park Lamps Control Circuit Open B3867 01: Right Park Lamps Control Circuit Short to Battery B3867 02: Right Park Lamps Control Circuit Short to Ground B3867 04: Right Park Lamps Control Circuit Open
DTC B258AB258A 01: Low Beam Control Circuit Short to Battery B258A 02: Low Beam Control Circuit Short to Ground B258A 04: Low Beam Control Circuit Open
DTC B2600 or B2605B2600 01: Left Daytime Running Lamps Control Circuit short to Battery B2600 02: Left Daytime Running Lamps Control Circuit Short to Ground B2600 04: Left Daytime Running Lamps Control Circuit Open B2605 01: Right Daytime Running Lamps Control Circuit short to Battery B2605 02: Right Daytime Running Lamps Control Circuit Short to Ground B2605 04: Right Daytime Running Lamps Control Circuit Open
DTC B2610B2610 02: Passenger Compartment Dimming 1 Circuit Short to Ground
DTC B2615B2615 02: Passenger Compartment Dimming 2 Circuit Short to Ground
DTC B2645B2645 03: Ambient Light Sensor Circuit Voltage Below Threshold B2645 07: Ambient Light Sensor Circuit Voltage Above Threshold
DTC B2652B2652 02: Passenger Compartment Dimming 3 Circuit Short to Ground
DTC B3596B3596 00: Hazard Lamps Request Circuit
DTC B3650B3650 08: High Beam Request Signal Circuit Signal Invalid
DTC B3806B3806 00: High Beam and Headlamp Flash Select Circuit
DTC B3881 or B3882B3881 01: Tail Lamp Circuit Short to Battery B3881 02: Tail Lamp Circuit Short to Ground B3881 04: Tail Lamp Circuit Open B3882 01: Right Tail Lamp Circuit Short to Battery B3882 02: Right Tail Lamp Circuit Short to Ground B3882 04: Right Tail Lamp Circuit Open
DTC B3883B3883 01: License Plate Lamp Circuit Short to Battery B3883 02: License Plate Lamp Circuit Short to Ground B3883 04: License Plate Lamp Circuit Open
DTC B3884B3884 02: Center High Mounted Brake Lamp Circuit Short to Ground
DTC B3948 or B3949B3948 01: Left Front Turn Signal Circuit Short to Battery B3948 02: Left Front Turn Signal Circuit Short to Ground B3948 04: Left Front Turn Signal Circuit Open B3949 01: Right Front Turn Signal Circuit Short to Battery B3949 02: Right Front Turn Signal Circuit Short to Ground B3949 04: Right Front Turn Signal Circuit Open
DTC B3950 or B3951B3950 01: Left Rear Turn Signal Circuit Short to Battery B3950 02: Left Rear Turn Signal Circuit Short to Ground B3950 04: Left Rear Turn Signal Circuit Open B3951 01: Right Rear Turn Signal Circuit Short to Battery B3951 02: Right Rear Turn Signal Circuit Short to Ground B3951 04: Right Rear Turn Signal Circuit Open
DTC C0277 or C0890C0277 06: Brake Pedal Position Sensor Circuit Low Voltage/Open C0277 07: Brake Pedal Position Sensor Circuit High Voltage C0277 09: Brake Pedal Position Sensor Circuit Too Fast Transitions C0277 4B: Brake Pedal Position Sensor Calibration Not Learned C0890 03: Control Module Voltage Reference Output 3 Circuit Low Voltage C0890 07: Control Module Voltage Reference Output 3 Circuit High Voltage
DTC C0297C0297 02: Brake Applied Output Circuit Short to Ground

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Headlamp and Panel Dimmer Switch B+B1405 03, B1529 03, B257B 03B257B 03
Headlamp and Panel Dimmer Switch SignalB257B 03B257B 03B257B 07
Front Fog Lamp Relay Control11
Front Fog Lamp ControlB2530 02B2530 04B2530 01
Fog Lamp - Left Front Ground1
Fog Lamp - Right Front Ground1
1. Front Fog Lamps Malfunction

Circuit/System Description

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded momentarily by pressing the front fog lamp switch. The body control module (BCM) energizes the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energized, the relay switch contacts close and battery voltage is applied through the front fog lamp fuse to the front fog lamp supply voltage circuit which illuminates the front fog lamps.

Conditions for Running the DTC

Front fog lamps activated.

B2530 01

The BCM detects a short to battery on the control circuit.

B2530 02

The BCM detects a short to ground on the control circuit.

B2530 04

The BCM detects an open control circuit.

Action Taken When the DTC Sets

The front fog lamps will not operate.

Conditions for Clearing the DTC

The condition for setting the DTC is not longer present.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, command the Front Fog Lamps ON and OFF with a scan tool. The front fog lamps should turn ON and OFF when changing between the commanded states.

Circuit/System Testing

  1. Ignition OFF, disconnect the X2 harness connector at the X50A underhood fuse block.
  2. Connect a test lamp between B+ and the control circuit terminal 19.
  3. Ignition ON, command the Front Fog Lamps command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. If all circuits test normal, replace the X50A underhood fuse block.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Accessory Wiring Junction Block Retainer Replacement»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Backup Lamp Switch Signal (MV5/M10)111
Backup Lamp Switch Ground (MV5/M10)1
Backup Lamps ControlB2545 02B2545 04B2545 01
Backup Lamp - Left Ground1
Backup Lamp - Right Ground1
1. Backup Lamps Malfunction

Automatic Transmission

When the transmission is placed in the REVERSE position, the transmission control module (TCM) sends a serial data message to the body control module (BCM). The message indicates that the gear selector is in the REVERSE position. The BCM applies battery voltage to the backup lamps and inside rearview mirror. The backup lamps are permanently grounded. Once the driver moves the gear selector out of the REVERSE position, a message is sent by the TCM via serial data requesting the BCM to remove battery voltage from the backup lamps control circuit.

Manual Transmission

The engine control module (ECM) provides a signal circuit to the backup lamp switch which is permanently grounded. When the transmission is placed in the REVERSE position, the backup lamp switch signal circuit is pulled low and the ECM responds by sending a serial data message to the body control module (BCM). The message indicates that the gear selector is in the REVERSE position. The BCM applies battery voltage to the backup lamps which are permanently grounded. Once the driver moves the gear selector out of the REVERSE position, a message is sent by the ECM via serial data requesting the BCM to remove battery voltage from the backup lamps control circuit.

Battery voltage must be between 9-16 V.

B2545 01

The BCM detects a short to voltage in the backup lamps control circuit.

B2545 02

The BCM detects a short to ground in the backup lamps control circuit.

B2545 04

The BCM detects an open in the backup lamps control circuit.

Actions Taken When the DTC Sets

The backup lamps will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 backup lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Ignition ON, engine running, command the Backup Lamps Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 backup lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Backup Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Interior Backlighting ControlB255D 0221
1. Accent Lamp LEDs at Full Intensity and Cannot be Dimmed or Turned OFF 2. Accent Lamp LEDs do Not Illuminate

The body control module (BCM) supplies a voltage reference to the dimmer switch, which is part of the headlamp switch. When the dimmer switch is placed in a desired brightness position, reference voltage is applied through the dimmer switch to the BCM. The BCM interprets this voltage signal, then applies a variable voltage through the LED backlight lamp control circuit.

  1. The ignition is ON.
  2. The headlamps or park lamps are ON.

Conditions for Setting the DTC

The BCM detects a short to ground on the LED backlight lamp control circuit.

The BCM will not dim or illuminate any LED backlighting supplied by the backlight lamp control circuits.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Schematic Reference

  1. «Interior Lights Schematics»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Interior Lights Dimming Schematics»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the Interior Accent Lighting 2 ON and OFF with a scan tool. The interior accent lighting should turn ON and OFF when changing between the commanded states.

Note. Each back lighted component may need to be disconnected to isolate a short to voltage or short to ground. Use the schematic to identify the following: Back lighted components the vehicle is equipped with. Component locations on the back lighting dimming control circuit. Each components control and ground circuit terminals.

  1. Ignition OFF, disconnect the harness connector at any component with inoperative backlighting.
  2. Ignition OFF, scan tool disconnected, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit and ground.
  4. Command the Interior Accent Lighting 2 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the component with the inoperative backlighting.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Refer to the appropriate replacement procedure for the component causing the condition.
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Courtesy Lamps Switch On SignalB2615 00B2615 00B2615 00
Courtesy Lamp Defeat Signal444
Courtesy Lamps Switch Ground1
Rear Compartment Courtesy Lamp ControlB2560 02B2560 04B2560 01
Rear Compartment Courtesy Lamp Ground3
Accent Lamp Control111
Accent Lamp Ground1
Dome Lamp Ground2
1. Courtesy Lamps Malfunction 2. Dome Lamp Malfunction 3. Rear Compartment Courtesy Lamp Malfunction 4. Dome Lamp Defeat Switch Malfunction

The cargo lamp is controlled by the body control module (BCM). When the trunk is opened, the BCM receives a door ajar signal from the trunk latch assembly indicating the trunk is open. The BCM responds by applying voltage to the rear compartment courtesy lamp control circuit illuminating the rear compartment courtesy lamp. The rear compartment courtesy lamp is permanently grounded.

  1. Battery voltage must be between 9-16 V.
  2. Trunk OPEN.

B2560 01

The BCM detects a short to voltage in the cargo lamp control circuit.

B2560 02

The BCM detects a short to ground in the cargo lamp control circuit.

B2560 04

The BCM detects an open in the cargo lamp control circuit.

The BCM will disable the rear compartment courtesy lamp control circuit.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the E8S rear compartment courtesy lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Ignition ON, command the Trunk Lamp Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E8S rear compartment courtesy lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Rear Compartment Courtesy Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2699 01, B2699 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp and panel dimmer switch. The body control module (BCM) responds by applying a pulse width modulated (PWM) voltage to the left and right low beam headlamp control circuits illuminating the low beam headlamps.

  1. Battery voltage must be between 9-16 V.
  2. Low beam headlamps ON.

B2575 01

The BCM detects a short to voltage in the left headlamp low beam control circuit.

B2575 02

The BCM detects a short to ground in the left headlamp low beam control circuit.

B2575 04

The BCM detects an open in the left headlamp low beam control circuit.

B2699 01

The BCM detects a short to voltage in the right headlamp low beam control circuit.

B2699 02

The BCM detects a short to ground in the right headlamp low beam control circuit.

B2699 04

The BCM detects an open in the right headlamp low beam control circuit.

When DTC B2575 or B2699 is present, the associated low beam headlamp will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate T7 or E13 headlamp assembly.
  2. Ignition OFF, wait one minute, then test for less than 5 ohms between the ground circuit terminal listed below and ground: T7 headlamps - terminal A E13 headlamps - terminal 2 If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Command the Low Beam Lamp Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the T7 or E13 headlamp assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Headlamp Bulb Replacement (SS HID)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Headlamp Bulb Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of the diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

When the headlamp switch is placed in the AUTO position, the body control module (BCM) receives a ground signal through the headlamp switch headlamps OFF signal circuit. The headlamp switch headlamps ON signal circuit and the park lamp switch signal circuit are both open and have no ground signal. When the headlamp switch is placed in the PARK or HEAD position, the BCM will receive a ground signal through the headlamp switch headlamps ON signal circuit and the park lamp switch signal circuit. The headlamp switch headlamps OFF signal circuit will be open and have no ground signal.

Battery voltage must be between 9-16 V.

The BCM detects a short to ground on the headlamp switch headlamps OFF signal circuit or the headlamp switch headlamps ON signal circuit.

  1. When DTC B257A 00 is present on the headlamp switch headlamps OFF signal circuit, the low beam headlamps are always ON in the AUTO position. The headlamp switch operates in all positions other than AUTO. The AUTO headlamp defeat is inoperative.
  2. When DTC B257A 00 is present on the headlamp switch headlamps ON signal circuit, the low beam headlamps are always ON. The BCM disregards all headlamp switch inputs.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the X1 harness connector at the S30 headlamp switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Park Lamps Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 6. Verify the scan tool Park Lamps Switch is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. Verify the scan tool Headlamps On Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 6. Verify the scan tool Headlamps On Switch is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. Verify the scan tool Automatic Headlamps Disable Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  8. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Automatic Headlamps Disable Switch is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  9. If all circuits test normal, test or replace the S30 headlamp switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Headlamp and Panel Dimmer Switch B+B1405 03, B1529 03, B257B 03B257B 03
Headlamp and Panel Dimmer Switch SignalB257B 03B257B 03B257B 07
Front Fog Lamp Relay Control11
Front Fog Lamp ControlB2530 02B2530 041
Fog Lamp - Left Front Ground1
Fog Lamp - Right Front Ground1
1. Front Fog Lamps Malfunction

The instrument panel lamp dimmer switch is used to increase and decrease the brightness of the interior backlighting components. The instrument panel lamp dimmer switch provides a voltage signal that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) provides a low reference signal and a B+ voltage reference to the instrument panel lamp dimmer switch. When the instrument panel lamp dimmer switch is placed in the desired position, the dimmed voltage setting is applied from the instrument panel dimmer switch through the instrument panel lamp dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies the dimmed voltage to the instrument panel lamp lamps supply voltage circuit and the interior backlighting components dim to the requested level.

  1. Battery voltage must be between 9-16 V.
  2. Park lamps ON.

B257B 03

The BCM detects a short to ground in the instrument panel dimmer switch signal circuit.

B257B 07

The BCM detects a short to voltage in the instrument panel dimmer switch signal circuit.

The BCM will not DIM or illuminate any instrument panel lamps supplied by the instrument panel lamps dimmer switch signal circuit.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.
  2. Ignition ON, test for B+ between the B+ reference circuit terminal 1 and ground. If less than the specified range, test the B+ reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If greater than the specified range, test the B+ reference circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  3. Verify the scan tool Incandescent Dimming Duty Cycle Command parameter is greater than 45%. If less than the specified range, test the signal circuit terminal 12 for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 12 and the B+ reference circuit terminal 1. Verify the scan tool Incandescent Dimming Duty Cycle Command parameter is less than 8% If greater than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S30 headlamp switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

When the turn signal/multifunction switch is placed in the headlamps high or flash to pass position, ground is applied to the body control module (BCM) through the headlamp high beam signal circuit or the flash to pass switch signal circuit. The BCM applies ground to the headlamp high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the left and right HIGH BEAM fuses to the high beam headlamps.

  1. Battery voltage must be between 9-16 V.
  2. High beam headlamps ON.

B2580 01

The BCM detects a short to voltage in the headlamp high beam relay control circuit.

B2580 02

The BCM detects a short to ground in the headlamp high beam relay control circuit.

B2580 04

The BCM detects an open in the headlamp high beam relay control circuit.

The high beam headlamps and flash to pass will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the X2 harness connector at the X50A underhood fuse block.
  2. Connect a test lamp between the control circuit terminal 31 and the B+.
  3. Ignition ON, command the High Beam Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. If all circuits test normal, test or replace the X50A underhood fuse block.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Accessory Wiring Junction Block Retainer Replacement»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Park Lamp Switch ON SignalB257A 002
Left Front Park Lamps ControlB2585 02B2585 04B2585 01
Left Front Park Lamps Ground1
Right Front Park Lamps ControlB3867 02B3867 04B3867 01
Right Front Park Lamps Ground1
Left Rear Park Lamps ControlB3881 02B3881 04B3881 01
Right Rear Park Lamps ControlB3882 02B3882 04B3882 01
Left Front Side Marker Lamp Ground1
Right Front Side Marker Lamp Ground1
Left Rear Stop/Tail/Turn Signal Lamps Ground1
Right Rear Stop/Tail/Turn Signal Lamps Ground1
License Lamp ControlB3883 02B3883 04B3883 01
License Lamp Ground3
Headlamp Switch Ground2
1. Park, License, and/or Tail Lamps Malfunction 2. Park Lamp Switch Malfunction 3. License Lamps Malfunction

When the headlamp switch is placed in either the HEAD or PARK position, ground is applied to the park lamp signal circuit to the body control module (BCM). The BCM responds by applying voltage to the park lamps, tail lamps, and license lamps control circuits illuminating the park, tail, side marker, and license lamps.

  1. Battery voltage must be between 9-16 V.
  2. Park lamps ON.

B2585 01

The BCM detects a short to voltage in the left front park lamp control circuit.

B2585 02

The BCM detects a short to ground in the left front park lamp control circuit.

B2585 04

The BCM detects an open in the left front park lamp control circuit.

B3867 01

The BCM detects a short to voltage in the right front park lamp control circuit.

B3867 02

The BCM detects a short to ground in the right front park lamp control circuit.

B3867 04

The BCM detects an open in the right front park lamp control circuit.

The park lamps will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate park lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal listed below and ground: E4 Front Turn Signal Lamp - Terminal 1 E4 Park/Turn Signal Lamp - Terminal 1 E2 Side Marker Lamp - Terminal 2 E4 Front Park Lamp - Terminal A E5 Tail/Brake and Turn Signal Lamp - Terminal 1 If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal listed below and ground. E4 Front Turn Signal Lamp - Terminal 3 E4 Park/Turn Signal Lamp - Terminal 1 E2 Side Marker Lamp - Terminal 1 E4 Front Park Lamp - Terminal D E5 Tail/Brake and Turn Signal Lamp - Terminal 2
  4. Command the appropriate Front Park Lamp Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the park lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Parking and Turn Signal Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Front Side Marker Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Front Side Marker Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Rear Side Marker Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Rear Side Marker Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  6. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  7. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  8. «Tail Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  9. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

When the headlamp switch is placed in the headlamp position, ground is applied to the body control module (BCM) through the headlamp low beam signal circuit. The BCM responds to this input by applying ground to the headlamp low beam relay control circuit which energizes the low beam relay. With the low beam relay energized, the switch contacts close allowing battery voltage to flow through the left and right HID fuses to the low beam headlamps.

  1. Battery voltage must be between 9-16 V.
  2. Low beam headlamps ON.

B258A 01

The BCM detects a short to voltage in the headlamp low beam relay control circuit.

B258A 02

The BCM detects a short to ground in the headlamp low beam relay control circuit.

B258A 04

The BCM detects an open in the headlamp low beam relay control circuit.

The low beam headlamps will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the KR49 headlamp low beam relay.
  2. Connect a test lamp between the control circuit terminal 85 and the B+ circuit terminal 86.
  3. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. If all circuits test normal, test or replace the KR49 headlamp low beam relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ambient Light Sensor SignalB2645 03B2645 07B2645 07
Ambient Light Sensor GroundB2645 072
Daytime Running Lamp Control - Left (T4F)B2600 02B2600 04B2600 01
Daytime Running Lamp Ground - Left (T4F)2
Daytime Running Lamp Control - Right (T4F)B2605 02B2605 04B2605 01
Daytime Running Lamp Ground - Right (T4F)2
Left Low Beam Headlamp Control (T4A)B2575 02B2575 04B2575 01
Left Front Headlamp Low Beam Ground1
Right Low Beam Headlamp Control (T4A)B2699 02B2699 04B2699 01
Right Front Headlamp Low Beam Ground1
1. Headlamps Malfunction 2. Daytime Running Lamps Malfunction

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor which is permanently grounded. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON by applying a pulse width modulated (PWM) voltage to the left and right DRL control circuits illuminating the DRLs. Any function or condition that turns on the headlamps will cancel DRL operation.

  1. Battery voltage must be between 9-16 V.
  2. Headlamp switch in AUTO position.

B2600 01

The BCM detects a short to voltage in the left DRL control circuit.

B2600 02

The BCM detects a short to ground in the left DRL control circuit.

B2600 04

The BCM detects an open in the left DRL control circuit.

B2605 01

The BCM detects a short to voltage in the left DRL control circuit.

B2605 02

The BCM detects a short to ground in the left DRL control circuit.

B2605 04

The BCM detects an open in the left DRL control circuit.

The BCM will disable the appropriate DRL control circuit.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E4 daytime running lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Command the Dedicated Daytime Running Lamp Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E4 daytime running lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Daytime Running Lamp Bulb Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-rs) or «Daytime Running Lamp Bulb Replacement (SS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-ss)
  2. «Daytime Running Lamp Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
LED Backlight Dimming Control Terminal 8 X2B2610 0211
LED Backlight Dimming Control Terminal 9 X7B2610 0211
Automatic Transmission Shift Lever Position Indicator Ground1
Headlamp and Panel Dimmer Switch Ground1
Steering Wheel Control Switch - Left Ground1
Steering Wheel Control Switch - Right Ground1
Sunroof Switch Ground1
Traction Control Switch Ground1
Window Switch Driver Ground1
Window Switch Passenger Ground1
1. Interior Backlighting Malfunction

The up/down dimmer controls located on the headlamp and panel dimmer switch is used to increase and decrease the brightness of the interior backlighting components. Each dimmer control switch provides a voltage signal that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) supplies each dimmer control switch with a signal circuit. When either the up or down dimmer control switch is placed in the desired position, the dimmed voltage setting is applied from the appropriate dimmer control switch through the dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies a pulse width modulated (PWM) voltage to the LED backlight dimming control circuits and the interior backlighting components dim to the requested level.

  1. Battery voltage must be between 9-16 V.
  2. Park lamps ON.

The BCM detects a short to ground in the LED backlight dimming control circuits.

The BCM will not dim or illuminate any LED backlighting supplied by the backlight dimming control circuits.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at any component with inoperative accent lighting.
  2. Ignition OFF, scan tool disconnected, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit and ground.
  4. Command the Interior Accent Lighting 1 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the component with the inoperative accent lighting.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Refer to the appropriate replacement procedure for the component causing the condition.
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Dome/Reading Lamps ControlB2615 0211
Dome/Reading Lamps Ground1111
1. Courtesy Lamps Malfunction

The body control module (BCM) applies battery voltage to the dome/reading lamps through the dome/reading lamp control circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-ajar input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the dome/reading lamp control circuit, providing battery voltage to dome/reading lamps. In the event that the dome/reading lamp were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the dome/reading lamp control circuit to prevent a total battery discharge condition.

Battery voltage must be between 9-16 V.

The BCM detects a short to ground in the dome/reading lamp control circuit.

The BCM will not illuminate the dome/reading lamp control circuit.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at any component with inoperative accent lighting.
  2. Ignition OFF, scan tool disconnected, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit and ground.
  4. Command the Interior Accent Lighting 1 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the component with the inoperative accent lighting.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Refer to the appropriate replacement procedure for the component causing the condition.
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ambient Light Sensor SignalB2645 03B2645 07B2645 07
Ambient Light Sensor GroundB2645 072
Daytime Running Lamp Control - Left (T4F)B2600 02B2600 04B2600 01
Daytime Running Lamp Ground - Left (T4F)2
Daytime Running Lamp Control - Right (T4F)B2605 02B2605 04B2605 01
Daytime Running Lamp Ground - Right (T4F)2
Left Front Low Beam Headlamp Control (T4A)B2575 02B2575 04B2575 01
Left Front Headlamp Low Beam Ground1
Right Front Low Beam Headlamp Control (T4A)B2699 02B2699 04B2699 01
Right Front Headlamp Low Beam Ground1
1. Headlamps Malfunction 2. Daytime Running Lamps Malfunction

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions the BCM will command the DRLs ON. During low light conditions the BCM will command the DRLs ON. Any function or condition that turns on the headlamps will cancel DRL operation.

Battery voltage must be between 9-16 V.

B2645 03

The BCM detects a short to ground in the ambient light sensor signal circuit.

B2645 07

The BCM detects a short to voltage or an open/high resistance in the ambient light sensor signal circuit.

  1. Automatic lamp control is inoperative.
  2. The BCM defaults to low light status and commands the low beam headlamps ON.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the B10 ambient light sensor.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Ambient Light Sensor parameter is greater than 4.65 V. If less than the specified range, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Ambient Light Sensor parameter is less than 0.196 V. If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the B10 ambient light sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp Automatic Control Ambient Light Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Accent Lamp ControlB2652 0211
Accent Lamp - Driver Door Ground1
Accent Lamp - Passenger Door Ground1
Accent Lamp - Left Instrument Panel Ground1
Accent Lamp - Right Instrument Panel Ground1
1. Courtesy Lamps Malfunction

The body control module (BCM) applies a pulse width modulated (PWM) voltage to the interior accent lamps through the accent lamps control circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-ajar input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the accent lamps control circuit, providing battery voltage to accent lamps.

Battery voltage must be between 9-16 V.

The BCM detects a short to ground in the accent lamps control circuit.

The BCM will not illuminate the accent lamps.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Each accent lighting component may need to be disconnected to isolate a short to voltage or short to ground. Use the schematic to identify the following: Accent lighting components the vehicle is equipped with. Component locations on the accent lighting control circuit Each component's control and ground circuit terminals

  1. Ignition OFF, disconnect the harness connector at any component with inoperative accent lighting.
  2. Ignition OFF, scan tool disconnected, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit and ground.
  4. Command the Interior Accent Lighting 1 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the component with the inoperative accent lighting.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Refer to the appropriate replacement procedure for the component causing the condition.
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Hazard Switch Signal11B3596 00
Hazard Switch Ground1
1. Hazard Lamps Malfunction

The hazard flashers may be activated in any power mode. When the hazard switch signal circuit is momentarily grounded when the hazard switch is pressed. The BCM supplies battery voltage to all four turn signal lamps in an ON and OFF duty cycle. When the hazard switch is activated, the BCM sends a serial data message to the instrument cluster requesting both turn signal indicators to be cycled ON and OFF.

  1. Battery voltage must be between 9-16 V.
  2. Hazard lamps ON.

The BCM detects a short to voltage in the hazard switch signal circuit.

The hazard lamps will not operate when the hazard switch is active.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the A20 radio/HVAC controls.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 17 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Hazard Lamps Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 16 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 16 and the ground circuit terminal 17. Verify the scan tool Hazard Lamps Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the A20 radio/HVAC controls

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Radio Control Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

When the turn signal/multifunction switch is placed in the headlamps high or flash to pass position, ground is applied to the body control module (BCM) through the headlamp high beam signal circuit or the flash to pass switch signal circuit. The BCM applies ground to the headlamp high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the HI BEAM fuses to the high beam headlamps.

  1. Battery voltage must be between 9-16 V.
  2. High beam headlamps ON.

The BCM detects an invalid signal on the headlamp high beam signal circuit.

The high beam headlamps will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connectors at the S78 turn signal/multifunction switch.
  2. Ignition OFF, test for less than 5 ohms between and the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool High Beam Select switch parameter is Inactive. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool High Beam Select switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Turn Signal Multifunction Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

When the turn signal/multifunction switch is placed in the headlamps high or flash to pass position, ground is applied to the body control module (BCM) through the headlamp high beam signal circuit or the flash to pass switch signal circuit. The BCM applies ground to the headlamp high beam relay control circuit which energizes the high beam relay. With the high beam relay energized, the switch contacts close allowing battery voltage to flow through the HIGH BEAM fuses to the high beam headlamps.

  1. Battery voltage must be between 9-16 V.
  2. Headlamps ON.

The BCM detects a short to ground on the Flash to Pass switch signal circuit.

When DTC B3806 is present, flash to pass will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connectors at the S78 turn signal/multifunction switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Headlamp Flash Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Flash to Pass Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Turn Signal Multifunction Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Park Lamp Switch ON SignalB257A 002
Left Front Park Lamps ControlB2585 02B2585 04B2585 01
Left Front Park Lamps Ground1
Right Front Park Lamps ControlB3867 02B3867 04B3867 01
Right Front Park Lamps Ground1
Left Rear Park Lamps ControlB3881 02B3881 04B3881 01
Right Rear Park Lamps ControlB3882 02B3882 04B3882 01
Left Front Side Marker Lamp Ground1
Right Front Side Marker Lamp Ground1
Left Rear Stop/Tail/Turn Signal Lamps Ground1
Right Rear Stop/Tail/Turn Signal Lamps Ground1
License Lamp ControlB3883 02B3883 04B3883 01
License Lamp Ground3
Headlamp Switch Ground2
1. Park, License, and/or Tail Lamps Malfunction 2. Park Lamp Switch Malfunction 3. License Lamps Malfunction

When the headlamp switch is placed in either the HEAD or PARK position, ground is applied to the park lamp signal circuit to the body control module (BCM). The BCM responds by applying voltage to the park lamps, tail lamps, and license lamps control circuits illuminating the park, tail, side marker, and license lamps.

  1. Battery voltage must be between 9-16 V.
  2. Park lamps ON.

B3881 01

The BCM detects a short to voltage in the left rear tail lamp control circuit.

B3881 02

The BCM detects a short to ground in the left rear tail lamp control circuit.

B3881 04

The BCM detects an open in the left rear tail lamp control circuit.

B3882 01

The BCM detects a short to voltage in the right rear tail lamp control circuit.

B3882 02

The BCM detects a short to ground in the right rear tail lamp control circuit.

B3882 04

The BCM detects an open in the right rear tail lamp control circuit.

The appropriate tail lamp will not operate.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate tail lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal listed below and ground: E5 Tail/Stop and Turn Signal Lamp - terminal 1 E2 Side Marker Lamp-Rear - terminal 2 If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal listed below and ground: E5 Tail/Stop and Turn Signal Lamp - terminal 2 E2 Side Marker Lamp-Rear - terminal 1
  4. Ignition ON, command the Rear Park Lamp Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the tail lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Rear Side Marker Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
License Lamp ControlB3883 02B3883 04B3883 01
License Lamp Ground1
1. Park, License, and/or Tail Lamps Malfunction

When the headlamp switch is placed in either the HEAD or PARK position, ground is applied to the park lamp signal circuit to the body control module (BCM). The BCM responds by applying voltage to the park lamps, tail lamps, and license lamps control circuits illuminating the park, tail, side marker, and license lamps.

  1. Battery voltage must be between 9-16 V.
  2. Park lamps ON.

B3883 01

The BCM detects a short to voltage in the license lamp control circuit.

B3883 02

The BCM detects a short to ground in the license lamp control circuit.

B3883 04

The BCM detects an open in the license lamp control circuit.

The BCM will not illuminate the license lamps.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E7 license plate lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Ignition ON, command the License Plate Lamps Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E7 license plate lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Rear License Plate Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Brake Pedal Position Sensor 5 V ReferenceC0161 00, C0277 06, C0890 03, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0890 07, U0418 00
Brake Pedal Position Sensor SignalC0161 00, C0277 06, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0277 07, U0418 00C0277 09
Brake Pedal Position Sensor Low Reference11
Left Rear Tail/Stop and Turn Signal Lamp ControlB3950 02B3950 04B3950 01
Left Rear Tail/Stop and Turn Signal Lamp Ground1
Right Rear Tail/Stop and Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Tail/Stop and Turn Signal Lamp Ground1
Center High Mounted Stop Lamp ControlB3884 02B3884 022
Center High Mounted Stop Lamp Ground2
1. Stop Lamps Malfunction 2. Center High Mounted Stop Lamp Malfunction

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the right and left stop lamp control circuits, transmission control module (TCM), engine control module (ECM), and center high mounted stop lamp control circuit.

  1. Battery voltage must be between 9-16 V.
  2. Brakes APPLIED.

B3884 02

The BCM detects a short to ground in the center high mounted stop lamp control circuit.

The BCM will not illuminate the center high mounted stop lamp.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the E6 center high mounted stop lamp.
  2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 2.
  4. Command the Center Brake Lamp Command Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E6 center high mounted stop lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «High Mount Stop Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Left Turn Signal Switch Signal112
Right Turn Signal Switch Signal112
Turn Signal/Multifunction Switch Ground1
Left Front Turn Signal Lamp GroundB3948 02B3948 04B3948 01
Right Front Turn Signal Lamp Control1
Right Front Turn Signal Lamp GroundB3949 02B3949 04B3949 01
Left Rear Stop/Turn Signal Lamp Control1
Left Rear Stop/Tail/Turn Signal Lamp GroundB3950 02B3950 04B3950 01
Left Rear Stop/Tail/Turn Signal Lamp Ground1
Right Rear Stop/Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Stop/Tail/Turn Signal Lamp Ground1
1. Turn Signal Lamps and/or Indicators Malfunction 2. Hazard Lamps Malfunction

Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through their respective control circuits.

Battery voltage must be between 9-16 V.

B3948 01

The BCM detects a short to voltage in the Left Front turn signal control circuit.

B3948 02

The BCM detects a short to ground in the Left Front turn signal control circuit.

B3948 04

The BCM detects an open in the Left Front turn signal control circuit.

B3949 01

The BCM detects a short to voltage in the Right Front turn signal control circuit.

B3949 02

The BCM detects a short to ground in the Right Front turn signal control circuit.

B3949 04

The BCM detects an open in the Right Front turn signal control circuit.

The Left Front turn signal lamp will be ON at all times.

The Left Front turn signal lamp will not operate.

The Left Front turn signal lamp will be inoperative.

The Right Front turn signal lamp will be ON at all times.

The Right Front turn signal lamp will not operate.

The Right Front turn signal lamp will be inoperative.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Diagnostic Aids

  1. Check the Left Front turn signal bulb. If the bulb is open, DTC B3948 04 will set as current only.
  2. Check the Right Front turn signal bulb. If the bulb is open, DTC B3949 04 will set as current only.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E4 turn signal lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 3 and ground.
  4. Command the Turn Signal Lamp Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E4 turn signal lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Parking and Turn Signal Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Left Turn Signal Switch Signal112
Right Turn Signal Switch Signal112
Turn Signal/Multifunction Switch Ground1
Left Front Turn Signal Lamp GroundB3948 02B3948 04B3948 01
Right Front Turn Signal Lamp Control1
Right Front Turn Signal Lamp GroundB3949 02B3949 04B3949 01
Left Rear Stop/Turn Signal Lamp Control1
Left Rear Stop/Tail/Turn Signal Lamp GroundB3950 02B3950 04B3950 01
Left Rear Stop/Tail/Turn Signal Lamp Ground1
Right Rear Stop/Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Stop/Tail/Turn Signal Lamp Ground1
1. Turn Signal Lamps and/or Indicators Malfunction 2. Hazard Lamps Malfunction

Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through their respective control circuits.

Battery voltage must be between 9-16 V.

B3950 01

The BCM detects a short to voltage in the Left Rear turn signal control circuit.

B3950 02

The BCM detects a short to ground in the Left Rear turn signal control circuit.

B3950 04

The BCM detects an open in the Left Rear turn signal control circuit.

B3951 01

The BCM detects a short to voltage in the Right Rear turn signal control circuit.

B3951 02

The BCM detects a short to ground in the Right Rear turn signal control circuit.

B3951 04

The BCM detects an open in the Right Rear turn signal control circuit.

The Left Rear turn signal lamp will be ON at all times.

The Left Rear turn signal lamp will not operate.

The Left Rear turn signal lamp will be inoperative.

The Right Rear turn signal lamp will be ON at all times.

The Right Rear turn signal lamp will not operate.

The Right Rear turn signal lamp will be inoperative.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.
  1. Check the Left Rear turn signal bulb. If the bulb is open, DTC B3950 04 will set as current only.
  2. Check the Right Rear turn signal bulb. If the bulb is open, DTC B3951 04 will set as current only.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 turn signal lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 3 and ground.
  4. Command the Turn Signal Lamp Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 turn signal lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Brake Pedal Position Sensor 5 V ReferenceC0161 00, C0277 06, C0890 03, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0890 07, U0418 00
Brake Pedal Position Sensor SignalC0161 00, C0277 06, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0277 07, U0418 00C0277 09
Brake Pedal Position Sensor Low Reference11
Left Rear Tail/Stop and Turn Signal Lamp ControlB3950 02B3950 04B3950 01
Left Rear Tail/Stop and Turn Signal Lamp Ground1
Right Rear Tail/Stop and Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Tail/Stop and Turn Signal Lamp Ground1
Center High Mounted Stop Lamp ControlB3884 02B3884 02B3884 01
Center High Mounted Stop Lamp Ground2
1. Stop Lamps Malfunction 2. Center High Mounted Stop Lamp Malfunction

The brake pedal position (BPP) sensor is used to sense the action of the driver application of the brake pedal. The BPP sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5-volt reference voltage to the BPP sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the stop lamp control circuit illuminating the left and right tail/stop and turn signal lamps and the center high mounted stop lamp. The BCM also applies battery voltage to the transmission control module (TCM) and engine control module (ECM) via the brake applied signal circuit.

  1. Battery voltage must be between 9-16 V.
  2. Brakes APPLIED.

C0277 06

The BCM detects a short to ground or an open/high resistance in the BPP sensor signal circuit or the 5 V reference circuit.

C0277 07

The BCM detects a short to battery voltage in the BPP sensor signal circuit or the 5 V reference circuit.

C0277 09

The BCM detects the BPP sensor signal is changing faster than possible under normal operating conditions.

C0277 4B

The DTC will set when the BPP sensor home position is not learned.

C0890 03

The BCM detects a short to ground in the BPP sensor voltage reference circuit for 0.5 seconds or greater.

C0890 07

The BCM detects a short to battery voltage in the BPP sensor voltage reference circuits.

  1. The Traction Control indicator is commanded ON.
  2. If the DTC sets while the vehicle is running, the BCM will activate the brake lights when the vehicles transmission is not in the PARK position and the vehicle is not accelerating.
  3. For DTC C0277 4B the stop lamps may not activate at the expected BPPs.
  1. The condition responsible for setting the DTC no longer exists.
  2. For DTC C0277 07 the ignition must be cycled before the code can be cleared.
  3. For DTC C0277 4B a successful BPP sensor calibration has been performed.
  4. A history DTC will clear once 50 malfunction-free ignition cycles have occurred.
  5. A DTC will not clear the current status until the next ignition cycle.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

C0277 06, C0277 07, C0890 03, and C0890 07

  1. Ignition OFF, disconnect the harness connector at the B22 BPP sensor.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal C and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between B+ and the low reference circuit terminal C. If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. Verify the scan tool BPP Sensor parameter is less than 1 V. If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal A. Verify the scan tool BPP Sensor parameter is greater than 4 V. If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the B22 BPP sensor.

C0277 09

  1. Replace the B22 BPP sensor.
  2. Perform the BPP sensor recalibration procedure. Refer to «Brake Pedal Position Sensor Calibration»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-calibration) .
  3. Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset. If the DTC resets, replace the K9 BCM.

C0277 4B

  1. Verify that the DTC sets under the Conditions for Running and Setting.
  2. Perform the BPP sensor recalibration procedure. Refer to «Brake Pedal Position Sensor Calibration»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-calibration) .
  3. Operate the vehicle within the conditions that the customer experienced and verify the DTC does not reset. If the DTC resets, replace the B22 BPP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Brake Pedal Position Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-replacement)
  2. «Brake Pedal Position Sensor Calibration»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-calibration)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Brake Applied SignalC0297 02, P0572P0572P0573

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the right and left stop lamp control circuits, engine control module (ECM), and center high mounted stop lamp control circuit.

  1. Battery voltage must be between 9-16 V.
  2. Brakes APPLIED.

The BCM detects a short to ground in the brake applied signal circuit.

  1. The BCM stores the DTC to memory.
  2. The Service Brake Assist indicator is commanded ON.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 50 malfunction-free ignition cycles have occurred.

Verify that the brake pedal position sensor is properly calibrated.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the appropriate harness connector listed below. K20 ECM harness connector X1 - with L99 and LS3 K20 ECM harness connector X2 - with LLT
  2. Connect a test lamp between the appropriate signal circuit terminal listed below and ground. Brake applied signal terminal 9 - with L99 and LS3 Brake applied signal terminal 52 - with LLT
  3. Ignition ON, turn the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when changing between the selected states. If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. If all circuits test normal, replace the K20 ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Brake Pedal Position Sensor Calibration»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-calibration)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM or ECM replacement, setup, and programming

Symptoms - Lighting

Note. The following steps must be completed before using a symptom table. Perform the Diagnostic System Check - Vehicle before using a symptom table in order to verify that all of the following conditions are true: There are no DTCs set. The control modules can communicate via the serial data link. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following: Exterior Lighting Systems Description and Operation Interior Lighting Systems Description and Operation

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to «Checking Aftermarket Accessories»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. «Backup Lamps Malfunction (Automatic Transmission)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Backup Lamps Malfunction (Manual Transmission)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Courtesy Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Daytime Running Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Front Fog Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Hazard Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  6. «Headlamps Malfunction (T4A)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Headlamps Malfunction (T4F)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  7. «High Intensity Discharge Lamp Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  8. «Interior Accent Lighting Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  9. «Interior Backlighting Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  10. «Park, License, and/or Tail Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  11. «Stop Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  12. «Turn Signal Lamps and/or Indicators Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Backup Lamp Switch Signal (MV5/M10)111
Backup Lamp Switch Ground (MV5/M10)1
Backup Lamps ControlB2545 02B2545 04B2545 01
Backup Lamp - Left Ground1
Backup Lamp - Right Ground1
1. Backup Lamps Malfunction

When the transmission is placed in the REVERSE position, the transmission control module (TCM) sends a serial data message to the body control module (BCM). The message indicates that the gear selector is in the REVERSE position. The BCM applies battery voltage to the backup lamps and inside rearview mirror. The backup lamps are permanently grounded. Once the driver moves the gear selector out of the REVERSE position, a message is sent by the TCM via serial data requesting the BCM to remove battery voltage from the backup lamps control circuit.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 backup lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Engine running, command the Backup Lamps Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 backup lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Backup Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Backup Lamp Switch Signal (MV5/M10)111
Backup Lamp Switch Ground (MV5/M10)1
Backup Lamps ControlB2545 02B2545 04B2545 01
Backup Lamp - Left Ground1
Backup Lamp - Right Ground1
1. Backup Lamps Malfunction

The engine control module (ECM) provides a signal circuit to the backup lamp switch which is permanently grounded. When the transmission is placed in the REVERSE position, the backup lamp switch signal circuit is pulled low and the ECM responds by sending a serial data message to the body control module (BCM). The message indicates that the gear selector is in the REVERSE position. The BCM applies battery voltage to the backup lamps which are permanently grounded. Once the driver moves the gear selector out of the REVERSE position, a message is sent by the ECM via serial data requesting the BCM to remove battery voltage from the backup lamps control circuit.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, engine running, command the Backup Lamps Relay Command ON and OFF with a scan tool. The backup lamps should turn ON and OFF when changing between the commanded states. If the backup lamps turn ON and OFF when changing between the commanded states, refer to Backup Lamps Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Engine running, shift the vehicle between the park and reverse gears. The backup lamps should turn ON and OFF when changing between the selected states. If the backup lamps do not turn ON and OFF when changing between the selected states, refer to Backup Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Backup Lamps Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the B16 backup lamp switch.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal listed below and ground. Terminal B (M10) Terminal 2 (MV5) If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the signal circuit terminal listed below and ground. Terminal A (M10) Terminal 1 (MV5) If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal and the ground circuit terminal. The backup lamps should illuminate. If the backup lamps do not illuminate, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  5. If all circuits test normal, test or replace the B16 backup lamp switch.

Backup Lamps Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 backup lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Engine running, command the Backup Lamps Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 backup lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Backup Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Backup Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/manual-trans/#manual-transmission-tremec-6-speed)
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM or BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Courtesy Lamps Switch On SignalB2615 00B2615 00B2615 00
Courtesy Lamp Defeat Signal111
Courtesy Lamps Defeat Switch Ground1
Rear Compartment Courtesy Lamp ControlB2560 02B2560 04B2560 01
Rear Compartment Courtesy Lamp Ground4
Dome Lamp Control223
Dome Lamp Ground2
1. Dome Lamp Defeat Switch Malfunction 2. Dome Lamp Inoperable 3. Dome Lamp Always ON 4. Rear Compartment Courtesy Lamp Inoperable

The body control module (BCM) applies battery voltage to the dome lamp through the dome lamp supply voltage circuit. When any door is opened, the door ajar switch contacts close and the BCM receives a door-ajar input and will supply system voltage to the dome lamp. If the BCM receives a trunk open input, the BCM will activate the rear compartment courtesy lamp supply voltage circuit, providing system voltage to rear compartment courtesy lamp.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Door Ajar Switch parameter while opening and closing each vehicle door. The parameter should change between Inactive and Active. If the parameter does not change between the selected states, refer to «Door Ajar Indicator Malfunction»(/chevrolet/camaro/v-2009-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) .
  2. Observe the scan tool Rear Closure Ajar Switch parameter while opening and closing the trunk. The parameter should change between Active and Inactive. If the parameter does not change between the selected states, refer to «Trunk Ajar Indicator Malfunction»(/chevrolet/camaro/v-2009-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) .
  3. Observe the scan tool Interior/Courtesy Lighting Master Switch parameter while turning the courtesy lamp defeat switch ON and OFF. The parameter should change between Active and Inactive. If the courtesy lamps do not turn ON and OFF when commanded, refer to Dome Lamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  4. Courtesy lamp defeat switch OFF, observe the scan tool Dome Lamp Switch parameter while turning the dome lamp switch ON and OFF. The parameter should change between Active and Inactive. If the courtesy lamps do not turn ON and OFF when commanded, refer to Dome Lamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  5. Command the Courtesy Lamps ON and OFF with a scan tool. The courtesy lamps should turn ON and OFF when changing between the commanded states. If the courtesy lamps do not turn ON and OFF when commanded, refer to Dome Lamp Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  6. Command the Trunk Lamp ON and OFF with a scan tool. Rear compartment courtesy lamp should turn ON and OFF when changing between the commanded states. If the rear compartment courtesy lamp does not turn ON and OFF when commanded, refer to Rear Compartment Courtesy Lamp Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Dome Lamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the E37A dome/reading lamps.
  2. Scan tool OFF, doors CLOSED, interior lamps OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance
  3. Ignition ON, verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K9 BCM
  4. Verify the scan tool Dome Lamp Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Connect a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Active. If not the specified value, test the signal circuit terminal 4 for a short to B+ or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Connect a 3 A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Dome Lamp Switch parameter is Active. If not the specified value, test the signal circuit terminal 5 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, replace the E37A dome/reading lamps.

Dome Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the E37A dome/reading lamps.
  2. Test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 2 and ground.
  4. Ignition ON, command the Courtesy Lamps Duty Cycle Command ON and OFF with a scan tool, the test lamp should turn ON and OFF while changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E37A dome/reading lamps.

Rear Compartment Courtesy Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the E8S rear compartment courtesy lamp.
  2. Test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Ignition ON, command the Trunk Lamp Command ON and OFF with a scan tool, the test lamp should turn ON and OFF while changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E8S rear compartment courtesy lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Refer to the appropriate replacement procedure for the component causing the condition.
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ambient Light Sensor SignalB2645 03B2645 07B2645 07
Ambient Light Sensor GroundB2645 072
Daytime Running Lamp Control - Left (T4F)B2600 02B2600 04B2600 01
Daytime Running Lamp Ground - Left (T4F)2
Daytime Running Lamp Control - Right (T4F)B2605 02B2605 04B2605 01
Daytime Running Lamp Ground - Right (T4F)2
Left Front Low Beam Headlamp Control (T4A)B2575 02B2575 04B2575 01
Left Front Headlamp Low Beam Ground1
Right Front Low Beam Headlamp Control (T4A)B2699 02B2699 04B2699 01
Right Front Headlamp Low Beam Ground1
1. Headlamps Malfunction 2. Daytime Running Lamps Malfunction

Daytime Running Lamps (T4A)

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor which is permanently grounded. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions the BCM will command the low beam headlamps ON by applying a pulse width modulated (PWM) voltage to the left and right low beam headlamp control circuits illuminating the low beam headlamps. Any function or condition that turns on the headlamps will cancel DRL operation.

Daytime Running Lamps (T4F)

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor which is permanently grounded. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON by applying a pulse width modulated (PWM) voltage to the left and right DRL control circuits illuminating the DRLs. Any function or condition that turns on the headlamps will cancel DRL operation.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Daytime Running Lamps (T4A)

  1. Ignition ON, headlamps OFF, command the Low Beam Headlamps ON and OFF with a scan tool. The low beam headlamps should turn ON and OFF when changing between the commanded states. If the low beam headlamps do not change between the commanded states, refer to «Headlamps Malfunction (T4A)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Headlamps Malfunction (T4F)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the scan tool Ambient Light Status parameter while supplying sufficient light to simulate daylight conditions to the ambient light sensor. After 30 seconds, the parameter should be Daylight. If not the specified value, refer to the Ambient Light Sensor Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Daytime Running Lamps (T4F)

  1. Ignition ON, headlamps OFF, command the Low Beam Headlamps ON and OFF with a scan tool. The low beam headlamps should turn ON and OFF when changing between the commanded states. If the low beam headlamps do not change between the commanded states, refer to «Headlamps Malfunction (T4A)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Headlamps Malfunction (T4F)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Headlamps OFF, command the Left or Right Dedicated Daytime Running Lamp Command ON and OFF with a scan tool. The daytime running lights should turn ON and OFF when changing between the commanded states. If the daytime running lamps do not change between the commanded states, refer to Daytime Running Lamp Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Observe the scan tool Ambient Light Status parameter while supplying sufficient light to simulate daylight conditions to the ambient light sensor. After 30 seconds, the parameter should be Day. If not the specified value, refer to the Ambient Light Sensor Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Ambient Light Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the B10 ambient light sensor.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specific range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Ambient Light Sensor parameter is greater than 4.65 V. If less than the specified range, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Ambient Light Sensor parameter is less than 0.196 V. If greater than the specified range, test the signal circuit for a short to voltage an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the B10 ambient light sensor.

Daytime Running Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate E4 daytime running lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the signal circuit terminal 1 and ground.
  4. Command the Dedicated Daytime Running Lamp Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E4 daytime running lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp Automatic Control Ambient Light Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Daytime Running Lamp Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Daytime Running Lamp Bulb Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-rs) or «Daytime Running Lamp Bulb Replacement (SS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-ss)
  4. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Headlamp and Panel Dimmer Switch B+B1405 03, B1529 03, B257B 03B257B 03
Headlamp and Panel Dimmer Switch SignalB257B 03B257B 03B257B 07
Front Fog Lamp Relay Control11
Front Fog Lamp ControlB2530 02B2530 041
Fog Lamp - Left Front Ground1
Fog Lamp - Right Front Ground1
1. Front Fog Lamps Malfunction

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded momentarily by pressing the front fog lamp switch. The body control module (BCM) energizes the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energized, the relay switch contacts close and battery voltage is applied through the FOG LAMP fuse to the front fog lamp control circuit which illuminates the front fog lamps.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Front Fog Lamps Switch parameter while turning the front fog lamps switch ON and OFF. The parameter should change between Active and Inactive. If the parameter does not change between the commanded states, refer to Front Fog Lamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the scan tool Front Fog Lamps Relay Command parameter while turning the front fog lamps switch ON and OFF. The parameter should change between Active and Inactive. If the parameter does not change between the commanded states, refer to Front Fog Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Command the All Indicators Test ON and OFF with a scan tool. The font fog lamps indicator should turn ON and OFF when changing between the commanded states. If the front fog lamps indicator illuminates during the test, replace the K9 BCM. If the front fog lamps indicator does not illuminate during the test or remains illuminated at all times, replace the P16 instrument cluster.

Front Fog Lamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.
  2. Ignition ON, verify that a test lamp illuminates between the 12 V reference circuit terminal 1 and ground. If the test lamp does not illuminate, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal and the circuit fuse is open, test the signal circuit terminal 12 for a short to ground.
  3. Verify the scan tool Front Fog Lamps Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 12 for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 12 and the 12 V reference circuit terminal 1. Verify the scan tool Front Fog Lamps Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S30 headlamp switch.

Front Fog Lamps Malfunction

  1. Ignition OFF, disconnect the X2 harness connector at the X50A underhood fuse block.
  2. Connect a test lamp between the control circuit terminal 19 and B+.
  3. Command the Front Fog Lamps Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition OFF, connect the X2 harness connector at the X50A underhood fuse block. Disconnect the harness connector at the appropriate E29 Fog Lamp - Front.
  5. Test for less than 5 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  6. Connect a test lamp between the control circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Command the Front Fog Lamps Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the E29 Fog Lamp - Front. If the test lamp is always OFF and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the E29 Fog Lamp - Front. If the test lamp is always OFF and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test or replace the E29 Fog Lamp - Front.
  8. If all circuits test normal, test or replace the X50A underhood fuse block.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Front Fog Lamp Replacement (Base/SS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Accessory Wiring Junction Block Retainer Replacement»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  3. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM and instrument cluster replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Hazard Switch Signal11B3596 00
Hazard Switch Ground1
1. Hazard Lamps Malfunction

The hazard flashers may be activated in any power mode. The hazard switch signal circuit is momentarily grounded when the hazard switch is pressed. The BCM supplies battery voltage to all four turn signal lamps in an ON and OFF duty cycle. When the hazard switch is activated, the BCM sends a serial data message to the instrument cluster requesting both turn signal indicators to be cycled ON and OFF.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Hazard Lamp Switch parameter while turning the hazard lamp switch ON and OFF. The reading should change between Active and Inactive. If the parameter does not change between the commanded states, refer to «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the right and left turn signal lamps while turning the hazard lamp switch ON and OFF. The right and left turn signal lamps should flash ON and OFF while the hazard lamp switch is ON and remain OFF when the hazard lamp switch is OFF. If the turn signal lamps do not cycle between the selected states, refer to «Turn Signal Lamps and/or Indicators Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Command the All Indicators Test ON and OFF with a scan tool. The left and right turn signal indicators should turn ON and OFF when changing between the commanded states. If the left and right turn signal indicators illuminate during the test, replace the K9 BCM. If the left and right turn signal indicators do not illuminate during the test or remain illuminated at all times, replace the P16 instrument cluster.
  1. Ignition OFF, disconnect the harness connector at the A20 radio/HVAC controls.
  2. Ignition OFF, test for less than 5 ohms the ground circuit terminal 17 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Hazard Lamps Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 16 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 16 and the ground circuit terminal 17. Verify the scan tool Hazard Lamps Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the A20 radio/HVAC controls.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Radio Control Assembly Replacement»(/chevrolet/camaro/v-2009-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
  2. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM or instrument cluster replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Park Lamp Switch ON Signal2B257A 002
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Park Lamp Switch Malfunction

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp and panel dimmer switch. In response to this input, the body control module (BCM) provides ground to either the High Intensity Discharge (HID) headlamp relay control circuit or the headlamp high beam relay control circuit. The position of the headlamp dimmer switch determines which relay coil is supplied with ground. The underhood fuse block supplies battery voltage to the relay coil and switch circuits. The HID headlamps operate when the BCM grounds the HID headlamps relay control circuit to the HID headlamp relay coil. This energizes the HID relay coil causing the switch contacts to close. With the switch contacts closed, battery voltage is applied to the left and right HID fuses through to the left and right HID headlamps.

The following symptoms are noticeable signs of bulb failure

  1. Flickering light, caused in the early stages of bulb failure.
  2. Lights go out, caused when the ballast detects excessive, repetitive bulb re-strike.
  3. Color change-The lamp may change to a dim pink glow.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

WARNINGThe high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.
  1. Ignition OFF, disconnect the KR49 low beam headlamp relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground. If the test lamp illuminates, test the control circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Verify that a test lamp illuminates between the B+ circuit terminal 86 and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  5. Disconnect the harness connector at the appropriate T7 headlamp.
  6. Ignition OFF, scan tool OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Connect the harness connector at the appropriate T7 headlamp.
  8. Connect a 20 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the high intensity discharge headlamps are activated. If the high intensity discharge headlamps do not activate and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the T7 headlamp. If the high intensity discharge headlamps do not activate and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test or replace the T7 headlamp.
  9. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.
  10. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  11. If all circuits test normal, replace the KR49 low beam headlamp relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp Ballast Replacement (HID)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Headlamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  4. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp Low Beam Control (T4A)B2575 02B2575 01, B2575 04B2575 01
Right Headlamp Low Beam Control (T4A)B2699 02B2699 01, B2699 04B2699 01
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp and panel dimmer switch. For low beam headlamp operation, the body control module (BCM) responds by applying a pulse width modulated (PWM) voltage to the left and right low beam headlamp control circuits illuminating the low beam headlamps. For high beam headlamp operation, with the turn signal/multifunction switch in the high beam position, the high beam signal circuit is supplied with ground. The BCM responds to this input by applying ground to the high beam relay control circuit. The underhood fuse block supplies battery voltage to the relay coil and switch circuits of the high beam relay. With the high beam relay coil energized, the relay switch contacts close allowing voltage to flow through the left and right HIGH BEAM fuses to the high beam headlamps. With the high beams active, the BCM sends a serial data message to the instrument cluster requesting to illuminate the high beam indicator.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Headlamp On Switch parameter while turning the headlamp switch ON and OFF. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Headlamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the scan tool Automatic Headlamp Disable Switch parameter while applying and releasing the automatic lamp control disable switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Headlamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Observe the scan tool Headlamps Flash Switch parameter while applying and releasing the flash to pass switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Turn Signal/Multifunction Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  4. Observe the scan tool High Beam Select Switch parameter while applying and releasing the high beam select switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Turn Signal/Multifunction Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  5. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The low beam headlamps should turn ON and OFF when commanded. If the low beam headlamps do not turn ON and OFF when commanded, refer to Headlamps Malfunction - Low Beam in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  6. Command the High Beam Headlamps ON and OFF with a scan tool. The high beam headlamps should turn ON and OFF when commanded. If the high beam headlamps do not turn ON and OFF when commanded, refer to Headlamps Malfunction - High Beam in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  7. Command the All Indicators Test ON and OFF with a scan tool. The lights on indicator and high beam indicator should turn ON and OFF when changing between the commanded states. If the lights on indicator and high beam indicator illuminate during the test, replace the K9 BCM. If the lights on indicator and high beam indicator do not illuminate during the test or remain illuminated at all times, replace the P16 instrument cluster.
WARNINGThe high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.

Headlamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connectors at the S30 headlamp switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Headlamp On Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Verify the scan tool Automatic Headlamp Disable Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 5 for short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Headlamp On Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Automatic Headlamp Disable Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the S30 headlamp switch.

Turn Signal/Multifunction Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S78 turn signal/multifunction switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify the scan tool Headlamps Flash Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Verify the scan tool High Beam Select Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Headlamps Flash Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool High Beam Select Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Headlamps Malfunction - Low Beam

  1. Ignition OFF, disconnect the harness connector at the appropriate E13 headlamp.
  2. Ignition OFF, scan tool OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E13 headlamp.

Headlamps Malfunction - High Beam

  1. Ignition OFF, disconnect the X2 harness connector at the X50A underhood fuse block.
  2. Connect a test lamp between the control circuit terminal 31 and B+.
  3. Command the High Beam Headlamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition OFF, connect the X2 harness connector at the X50A underhood fuse block. Disconnect the harness connector at the appropriate E13 Headlamp.
  5. Test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  6. Connect a test lamp between the control circuit terminal 3 and ground.
  7. Command the High Beam Headlamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the X50A underhood fuse block. If the test lamp is always OFF and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the X50A underhood fuse block. If the test lamp is always OFF and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test or replace the E13 Headlamp.
  8. If all circuits test normal, test or replace the E13 Headlamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Accessory Wiring Junction Block Retainer Replacement»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  2. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Headlamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Turn Signal Multifunction Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM or instrument cluster replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Flash to Pass Switch SignalB3806 002B3806 00
Turn Signal/Multifunction Switch High Beam SignalB3650 0822
Turn Signal/Multifunction Switch Ground3
Park Lamp Switch ON Signal4B257A 004
Headlamp Switch Headlamps ON SignalB257A 0011
Headlamp Switch Headlamps OFF SignalB257A 0011
Headlamp High Beam Relay ControlB2580 02B2580 04B2580 01
Headlamp Low Beam Relay Control (T4F)B258A 02B258A 04B258A 01
Left Headlamp High Beam Control222
Right Headlamp High Beam Control222
Left Headlamp GroundB2575 01, B2575 04
Right Headlamp GroundB2575 01, B2575 04
Headlamp and Panel Dimmer Switch Ground1
1. Headlamp Switch Malfunction 2. Headlamps Malfunction - High Beam 3. Turn Signal/Multifunction Switch Malfunction 4. Park Lamp Switch Malfunction

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp and panel dimmer switch. In response to this input, the body control module (BCM) provides ground to either the high intensity discharge (HID) headlamp control circuit or the headlamp high beam relay control circuit. The position of the headlamp dimmer switch determines which relay coil is supplied with ground. The underhood fuse block supplies battery voltage to the relay coil and switch circuits. The HID headlamps operate when the BCM grounds the HID headlamp relay control circuit to the HID headlamp relay coil. This energizes the HID headlamp relay coil causing the switch contacts to close. With the switch contacts closed, battery voltage is applied to the left and right HID fuses through to the left and right HID headlamps. When the headlamp high beam relay coil is energized, current flows through the left and right HIGH BEAM fuses to the high beam headlamps. With the headlamp dimmer switch in the high beam position the BCM sends a serial data message to the instrument cluster requesting to illuminate the high beam indicator.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Headlamp On Switch parameter while turning the headlamp switch ON and OFF. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Headlamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the scan tool Automatic Headlamp Disable Switch parameter while applying and releasing the automatic lamp control disable switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Headlamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Observe the scan tool Headlamps Flash Switch parameter while applying and releasing the flash to pass switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Turn Signal/Multifunction Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  4. Observe the scan tool High Beam Select Switch parameter while applying and releasing the high beam select switch. The reading should toggle between Active and Inactive. If the reading does not change between the commanded states, refer to Turn Signal/Multifunction Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  5. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The low beam headlamps should turn ON and OFF when commanded. If the low beam headlamps do not turn ON and OFF when commanded, refer to Headlamps Malfunction - Low Beams in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  6. Command the Dedicated Daytime Running Lamp ON and OFF with a scan tool. The daytime running lamp should turn ON and OFF when commanded. If the daytime running lamp does not turn ON and OFF when commanded, refer to Headlamps Malfunction - Daytime Running Lamps in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  7. Command the High Beam Headlamps ON and OFF with a scan tool. The high beam headlamps should turn ON and OFF when commanded. If the high beam headlamps do not turn ON and OFF when commanded, refer to Headlamps Malfunction - High Beam «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  8. Command the All Indicators Test ON and OFF with a scan tool. The lights on indicator and high beam indicator should turn ON and OFF when changing between the commanded states. If the lights on indicator and high beam indicator illuminate during the test, replace the K9 BCM. If the lights on indicator and high beam indicator do not illuminate during the test or remain illuminated at all times, replace the P16 instrument cluster.
WARNINGThe high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.

Headlamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connectors at the S30 headlamp switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Headlamp On Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Verify the scan tool Automatic Headlamp Disable Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 5 for short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Headlamp On Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Automatic Headlamp Disable Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the S30 headlamp switch.

Turn Signal/Multifunction Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S78 turn signal/multifunction switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify the scan tool Headlamps Flash Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Verify the scan tool High Beam Select Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Headlamps Flash Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool High Beam Select Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Headlamps Malfunction - Low Beam

  1. Ignition OFF, disconnect the KR49 low beam headlamp relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground. If the test lamp illuminates, test the control circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Verify that a test lamp illuminates between the B+ circuit terminal 86 and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  5. Disconnect the harness connector at the appropriate T7 headlamp.
  6. Ignition OFF, scan tool OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Connect the harness connector at the T7 headlamp.
  8. Connect a 20 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the T7 headlamps are activated. If the T7 headlamps do not activate and the circuit fuse is good, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the T7 headlamp ballast. If the T7 headlamps do not activate and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test or replace the T7 headlamp ballast.
  9. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.
  10. Command the Headlamp Low Beam Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  11. If all circuits test normal, test or replace the KR49 low beam headlamp relay.

Headlamps Malfunction - Daytime Running Lamps

  1. Ignition OFF, disconnect the harness connector at the appropriate E4 daytime running lamp.
  2. Ignition OFF, scan tool OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the signal circuit terminal 1 and ground.
  4. Command the Dedicated Daytime Running Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E4 daytime running lamp.

Headlamps Malfunction - High Beam

  1. Ignition OFF, disconnect the X2 harness connector at X50A underhood fuse block.
  2. Connect a test lamp between the control circuit terminal 31 and B+.
  3. Command the High Beam Headlamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition OFF, connect the X2 harness connector at the X50A underhood fuse block. Disconnect the harness connector at the appropriate M28 High Beam Solenoid Actuator.
  5. Test for less than 5 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  6. Connect a test lamp between the control circuit terminal C and ground.
  7. Command the High Beam Headlamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the X50A underhood fuse block. If the test lamp is always OFF and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests normal, replace the X50A underhood fuse block. If the test lamp is always off and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test of replace the M28 High Beam Solenoid Actuator.
  8. If all circuits test normal, test or replace the X50A underhood fuse block.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Accessory Wiring Junction Block Retainer Replacement»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  2. «Daytime Running Lamp Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Daytime Running Lamp Bulb Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-rs) or «Daytime Running Lamp Bulb Replacement (SS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__daytime-running-lamp-bulb-replacement-ss)
  4. «Headlamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Headlamp Ballast Replacement (HID)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  6. «Headlamp Bulb Replacement (SS HID)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) or «Headlamp Bulb Replacement (RS)»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  7. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  8. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
  9. «Turn Signal Multifunction Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  10. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM or instrument cluster replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Accent Lamp Control112
Accent Lamp Ground1
1. Interior Accent Lighting Inoperative 2. Interior Accent Lighting Always ON

The body control module (BCM) uses the ambient light sensor to determine which brightness of the accent lamps is needed. The BCM provides B+ voltage to the individual accent lamps via the accent lamps control circuit.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the Accent Lighting ON and OFF with a scan tool. The accent lighting should turn ON and OFF when changing between the commanded sates.

  1. Ignition OFF, disconnect the harness connector at the appropriate E1 accent lamp.
  2. Test for less than 5.0 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal B and ground.
  4. Ignition ON, command the Accent Lighting ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E1 accent lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
LED Backlight Dimming Control Terminal 8 X2B2610 0211
LED Backlight Dimming Control Terminal 9 X7B2610 0211
Automatic Transmission Shift Lever Position Indicator Ground1
Headlamp and Panel Dimmer Switch Ground1
Steering Wheel Control Switch - Left Ground1
Steering Wheel Control Switch - Right Ground1
Sunroof Switch Ground1
Traction Control Switch Ground1
Window Switch Driver Ground1
Window Switch Passenger Ground1
1. Interior Backlighting Inoperative

The up/down dimmer controls located on the headlamp and panel dimmer switch is used to increase and decrease the brightness of the interior backlighting components. Each dimmer control switch provides a voltage signal that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) supplies each dimmer control switch with a signal circuit. When either the up or down dimmer control switch is placed in the desired position, the dimmed voltage setting is applied from the appropriate dimmer control switch through the dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies the dimmed voltage to the LED and incandescent backlight dimming control circuits and the interior backlighting components dim to the requested level.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, command the Parking Lamps ON and OFF with a scan tool. The park lamps should turn ON and OFF when changing between the commanded states. If the park lamps do not turn ON and OFF when commanded, refer to «Park, License, and/or Tail Lamps Malfunction»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Observe the scan tool LED Backlight Dimming Command parameter while operating the dimmer switch from high to low. The parameters should change from a high percent to a low percent as the switch is activated. If the parameters do not change, refer to Panel Dimmer Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Observe the function for the backlights while commanding the LED Dimming Duty Cycle Command ON and OFF with a scan tool. All backlights should turn ON and OFF while changing between the commanded states. If a backlight does not turn ON or OFF, refer to Interior Backlighting Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Panel Dimmer Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.
  2. Ignition OFF, RAP OFF, scan tool disconnected, test for less than 5 ohms between the low reference circuit terminal 12 and ground. If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  3. Ignition ON, park lamps ON, test for greater than 10 V between the B+ circuit terminal 1 and ground. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the B+ circuit terminal 1 and the low reference circuit terminal 12. Verify the scan tool Dimming Control Signal parameter is a high %. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S30 headlamp switch.

Interior Backlighting Malfunction

  1. Ignition OFF, disconnect the harness connector at any component with inoperative backlighting.
  2. Ignition OFF, scan tool disconnected, interior lamps OFF, doors CLOSED, test for less than 5 ohms between the ground circuit and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit and ground.
  4. Command the LED Dimming Duty Cycle Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the component with inoperative backlighting.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. Refer to the appropriate replacement procedure for the component causing the condition.
  3. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Park Lamp Switch ON SignalB257A 002
Left Front Park Lamps ControlB2585 02B2585 04B2585 01
Left Front Park Lamps Ground1
Right Front Park Lamps ControlB3867 02B3867 04B3867 01
Right Front Park Lamps Ground1
Left Rear Park Lamps ControlB3881 02B3881 04B3881 01
Right Rear Park Lamps ControlB3882 02B3882 04B3882 01
Left Front Side Marker Lamp Ground1
Right Front Side Marker Lamp Ground1
Left Rear Stop/Tail/Turn Signal Lamps Ground1
Right Rear Stop/Tail/Turn Signal Lamps Ground1
License Lamp ControlB3883 02B3883 04B3883 01
License Lamp Ground3
Headlamp Switch Ground2
1. Park, License, and/or Tail Lamps Malfunction 2. Park Lamp Switch Malfunction 3. License Lamps Malfunction

When the headlamp and panel dimmer switch is placed in either the HEAD or PARK position, ground is applied to the park lamp signal circuit to the body control module (BCM). The BCM responds by applying voltage to the park lamps, tail lamps, and license lamps control circuits illuminating the park, tail, side marker, and license lamps.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Parking Lamp Switch parameter while cycling the park lamp between the OFF and Park positions. The parameter should toggle between Active and Inactive. If the readings do not change between the commanded states, refer to Park Lamp Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Command the Parking Lamps ON and OFF with a scan tool. The park lamps should turn ON and OFF when changing between the commanded states. If the park lamps do not turn ON and OFF when commanded, refer to Park, License, and/or Tail Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Command the Parking Lamps ON and OFF with a scan tool. The license plate lamps should turn ON and OFF when changing between the commanded states. If the license plate lamps do not turn ON and OFF when commanded, refer to License Plate Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Park Lamp Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 6 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Park Lamp Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 3 and ground. Verify the scan tool Park Lamp Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the S30 headlamp switch.

Park, Marker, and/or Tail Lamps Malfunction

  1. Ignition OFF, Disconnect the harness connector at the appropriate park lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal listed below and ground. E4 Park/Turn Signal Lamp - terminal 1 E4 Front Park Lamp - terminal A E5 Tail/Stop and Turn Signal Lamp - terminal 1 E2 Side Marker Lamp - terminal 2 If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal listed below and ground. E4 Park/Turn Signal Lamp - terminal 2 E4 Front Park Lamp - terminal D E5 Tail/Stop and Turn Signal Lamp - terminal 2 E2 Side Marker Lamp - terminal 1
  4. Command the appropriate park lamp test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the park lamp.

License Plate Lamps Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate E7 license plate lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Turn the license plate lamps ON and OFF with the parklamp switch. The test lamp should turn ON and OFF when changing between the selected states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E7 license plate lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Rear License Plate Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Front Side Marker Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  3. «Rear Side Marker Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  6. «Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  7. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Brake Pedal Position Sensor 5 V ReferenceC0161 00, C0277 06, C0890 03, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0890 07, U0418 00
Brake Pedal Position Sensor SignalC0161 00, C0277 06, U0418 00C0161 00, C0277 06, U0418 00C0161 00, C0277 07, U0418 00C0277 09
Brake Pedal Position Sensor Low Reference11
Left Rear Tail/Stop and Turn Signal Lamp ControlB3950 02B3950 04B3950 01
Left Rear Tail/Stop and Turn Signal Lamp Ground1
Right Rear Tail/Stop and Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Tail/Stop and Turn Signal Lamp Ground1
Center High Mounted Stop Lamp ControlB3884 02B3884 02B3884 01
Center High Mounted Stop Lamp Ground2
1. Stop Lamps Malfunction 2. Center High Mounted Stop Lamp Malfunction

The brake pedal position (BPP) sensor is used to sense the action of the driver application of the brake pedal. The BPP sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5 V reference voltage to the BPP sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the right and left tail/stop and turn signal lamp control circuits and the center high mounted stop lamp control circuit illuminating the stop lamps.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Brake Applied Output Signal parameter as you apply and unapply the brake pedal. The reading should cycle between OFF and ON as the brake pedal is applied and released. If the reading does not change as the brake pedal is applied and released, refer to Brake Pedal Position (BPP) Sensor Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Command the Brake Lamp Command ON and OFF with a scan tool. The stop lamps should turn ON and OFF when changing between the commanded states. If the stop lamps do not illuminate when commanded, refer to Stop Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Command the Center Brake Lamp Command Test ON and OFF with a scan tool. The center high mounted stop lamp should turn ON and OFF when changing between the commanded states. If the center high mounted stop lamp does not illuminate when commanded, refer to Center High Mounted Stop Lamp Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .

Brake Pedal Position (BPP) Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the B22 BPP sensor.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal C and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between B+ and the low reference circuit terminal C. If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. Verify the scan tool BPP Sensor parameter is less than 1 V. If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal A. Verify the scan tool BPP Sensor parameter is greater than 4 V. If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the B22 BPP sensor.

Stop Lamps Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 stop lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 3 and ground.
  4. Command the Brake Lamp Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 stop lamp.

Center High Mounted Stop Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the E6 center high mounted stop lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 2.
  4. Command the Center Brake Lamp Command Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E6 center high mounted stop lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «High Mount Stop Lamp Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Brake Pedal Position Sensor Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system__brake-pedal-position-sensor-replacement)
  3. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Left Turn Signal Switch Signal112
Right Turn Signal Switch Signal112
Turn Signal/Multifunction Switch Ground1
Left Front Turn Signal Lamp ControlB3948 02B3948 04B3948 01
Left Front Turn Signal Lamp Ground1
Right Front Turn Signal Lamp ControlB3949 02B3949 04B3949 01
Right Front Turn Signal Lamp Ground1
Left Rear Stop/Turn Signal Lamp ControlB3950 02B3950 04B3950 01
Left Rear Stop/Tail/Turn Signal Lamp Ground1
Right Rear Stop/Turn Signal Lamp ControlB3951 02B3951 04B3951 01
Right Rear Stop/Tail/Turn Signal Lamp Ground1
1. Turn Signal Lamps and/or Indicators Malfunction 2. Turn Signal Switch Malfunction

Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through their respective control circuits.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Right Turn Signal Switch and Left Turn Signal Switch parameters while cycling the turn signal switch between the left and right positions. The parameters should change between Active and Inactive. If the parameters do not change between the selected states, refer to Turn Signal Switch Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  2. Ignition ON, observe the right and left turn signal lamps while cycling the turn signal switch between the right and left positions. Verify the turn signal lamps turn ON and OFF. If the turn signal lamps do not cycle between the selected states, refer to Turn Signal Lamps Malfunction in «Circuit/System Testing»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system) .
  3. Command the All Indicator Test ON and OFF with a scan tool. The left and right turn signal indicators should turn ON and OFF when changing between the commanded states. If the left and right turn signal indicators illuminate during the test, replace the K9 BCM. If the left and right turn signal indicators do not illuminate during the test or remain illuminated at all times, replace the P16 instrument cluster.

Turn Signal Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S78 turn signal/multifunction switch.
  2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Left Turn Signal Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  4. Verify the scan tool Right Turn Signal Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground. Verify the scan tool Right Turn Signal Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Left Turn Signal Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  7. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Turn Signal Lamps Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate turn signal lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 ohms between ground circuit terminal listed below and ground: E4 Turn Signal Lamp - Terminal 1 E5 Tail/Stop and Turn Signal Lamp - Terminal 1 E2 Side Marker Lamp - Terminal 2 If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between control circuit terminal listed below and ground: E4 Turn Signal Lamp - Terminal 3 E5 Tail/Stop and Turn Signal Lamp - Terminal 2 E2 Side Marker Lamp - Terminal 1
  4. Command the Turn Signal Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the turn signal lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Parking and Turn Signal Lamp Bulb Replacement»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  2. «Turn Signal Multifunction Switch Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  3. «Tail Lamp Replacement - Inboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  4. «Tail Lamp Replacement - Outboard»(/chevrolet/camaro/v-2009-2013/remont/exterior-lights/#lighting-system)
  5. «Control Module References»(/chevrolet/camaro/v-2009-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM or instrument cluster replacement, setup, and programming

Brake Pedal Position Sensor Calibration

Note. Brake system does not use a brake switch, stoplight switch or brakelight switch. System uses a Brake Pedal Position Sensor to control these functions.

Calibration Criteria

Note. Do not apply the brake pedal during the brake pedal position sensor calibration procedure. Any movement of the brake pedal during this procedure will cause the calibration procedure to fail. If this occurs, the brake pedal position sensor calibration must be repeated.

Brake pedal position sensor calibration must be performed after the brake pedal position sensor or body control module (BCM) have been serviced. The calibration procedure will set the brake pedal position sensor home value. This value is used by the BCM to determine the action of the driver applying the brake system and to provide this information to the vehicle subsystems via serial data.

Calibration Procedure

  1. Apply the parking brake.
  2. Place the transmission in the PARK position.
  3. Install a scan tool.
  4. Clear all BCM DTCs before proceeding.
  5. Navigate to the Module Diagnosis menu.
  6. Select BCM menu item.
  7. Select Configuration/Reset Functions menu item.
  8. Select the Brake Pedal Position Sensor Learn procedure and follow the directions displayed on the screen.

Brake Pedal Position Sensor Replacement

Note. Brake system does not use a brake switch, stoplight switch or brakelight switch. System uses a Brake Pedal Position Sensor to control these functions.

Scheme 11

Scheme 11: Brake Pedal Position Sensor Replacement
Scheme 11: Brake Pedal Position Sensor Replacement
CalloutComponent Name
1Brake Pedal Position Sensor Bolt CAUTION: Refer to Fastener Caution . Procedure: Remove the sensor bolt. Tighten: 9 N.m (80 lb in)
2Brake Pedal Position Sensor Procedure Disconnect the electrical connector. Pull the sensor away from the bracket. Recalibrate the brake pedal position sensor. Refer to Brake Pedal Position Sensor Calibration .
CAUTION
Refer to Fastener Caution .

Scheme 12

Scheme 12: Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement
Scheme 12: Headlamp, Instrument Panel Lamp Dimmer, and Fog Lamp Switch Replacement
CalloutComponent Name
1Headlamp and Instrument Panel Dimmer and Fog Lamp Switch Procedure Use flat bladed tool to release switch from trim panel. Disconnect electrical connector.

Scheme 13

Scheme 13: Headlamp Automatic Control Ambient Light Sensor Replacement
Scheme 13: Headlamp Automatic Control Ambient Light Sensor Replacement
CalloutComponent Name
Preliminary Procedure: Remove the instrument panel center air outlet grille. Refer to Instrument Panel Center Air Outlet Grille Replacement .
1Headlamp Auto Control Ambient Light Sensor Procedure Disconnect the electrical connector. Twist the sensor counterclockwise.

Scheme 14

Scheme 14: Dome and Reading Lamp Lens Replacement
Scheme 14: Dome and Reading Lamp Lens Replacement
CalloutComponent Name
1Dome and Reading Lamp Lens Procedure: Use appropriate tool to release the lens.

Scheme 15

Scheme 15: Courtesy Lamp Replacement
Scheme 15: Courtesy Lamp Replacement
CalloutComponent Name
Preliminary Procedure: Remove the dome and reading lamp lens. Refer to Dome and Reading Lamp Lens Replacement
1Courtesy Lamp Procedure Insert a flat bladed plastic tool into slot. Depress the integral 2 tabs to remove the courtesy lamp from the roof console. Disconnect the electrical connector.

Scheme 16

Scheme 16: Dome Lamp Bulb Replacement
Scheme 16: Dome Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the dome and reading lamp lens. Refer to Dome and Reading Lamp Lens Replacement
1Dome Lamp Bulb

Scheme 17

Scheme 17: Front Side Door Map Pocket Illumination Lamp Replacement
Scheme 17: Front Side Door Map Pocket Illumination Lamp Replacement
CalloutComponent Name
Preliminary Procedure: Remove the front side door trim panel. Refer to Front Side Door Trim Panel Replacement .
1Front Side Door Map Pocket Illumination Lamp Procedure Disconnect both ends of lamp from the light pipe. Disconnect wire from eight integral clips.

Scheme 18

Scheme 18: Headlamp Replacement
Scheme 18: Headlamp Replacement
CalloutComponent Name
Preliminary Procedure: WARNING: Refer to Halogen Bulb Warning . Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement .
1Headlamp Screw (Qty: 4) CAUTION: Refer to Fastener Caution . Tip: Tighten the headlamp screws in the mandatory sequence as shown. Tighten: 2.5 N.m (22 lb in)
2Headlamp Assembly Procedure Pull the lamp assembly forward and disconnect the forward lamp electrical harness connector from the headlamp. Transfer the headlamp bulbs, sockets and electrical harness into the new headlamp housing assembly. Upon assembly, aim both the headlamps. Refer to Headlamp Aiming .
WARNING
Refer to Halogen Bulb Warning .
CAUTION
Refer to Fastener Caution .

Scheme 19

Scheme 19: Headlamp Ballast Replacement (HID)
Scheme 19: Headlamp Ballast Replacement (HID)
CalloutComponent Name
WARNING: The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system. WARNING: The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly. Preliminary Procedure: Remove the headlamp assembly. Refer to Headlamp Replacement .
1Headlamp Ballast Screw (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: Hand tighten the screws.
2Headlamp Ballast Tip: Ensure the headlamp ballast seal is in place prior to installing the ballast onto the headlamp assembly.
WARNING
The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system.
WARNING
The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.
CAUTION
Refer to Fastener Caution .

Scheme 20

Scheme 20: Headlamp Bulb Replacement (SS HID)
Scheme 20: Headlamp Bulb Replacement (SS HID)
CalloutComponent Name
WARNING: The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly. WARNING: The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system. Preliminary Procedure: Open and support the hood in order to access the headlamp bulb accessory covers and bulb sockets.
1Headlamp Bulb Accessory Cover Tip: Rotate the cover counter-clockwise and remove.
2Headlamp Bulb Procedure Disconnect the headlamp bulb electrical connector. Rotate the lock ring 1/4 turn counter-clockwise. Pull the HID lamp from the headlamp assembly.
WARNING
The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.
WARNING
The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system.

Scheme 21

Scheme 21: Headlamp Bulb Replacement (RS)
Scheme 21: Headlamp Bulb Replacement (RS)
CalloutComponent Name
Preliminary Procedure: Open and support the hood assembly in order to reach and remove the headlamp bulb accessory covers and bulb sockets.
1Headlamp Bulb Accessory Cover Tip: Rotate the cover a quarter turn counter-clockwise and remove from the headlamp assembly.
2Headlamp Bulb Assembly WARNING: Refer to Halogen Bulb Warning . Procedure Disconnect the electrical connector from the bulb socket. Rotate the bulb socket counterclockwise and remove from the headlamp assembly.
WARNING
Refer to Halogen Bulb Warning .

Aiming Headlamps (Visual Aim)

Note. Some state and local laws specify requirements for headlamp aim. All of these laws must be complied with when performing any headlamp aiming operations.

Headlamp aim should be checked

  1. When a new headlamp capsule is installed.
  2. If service or repairs to the front end area have (or may have) disturbed the headlamps or their mounting.
  3. Suspension components have been replaced or repaired.
  1. The area will consist of a level surface large enough to allow for a vehicle and an additional 7.62 m (25 ft) measured from face of lamps to the front of the aiming screen.
  2. The screen will be 1.52 m (5 ft) high x 3.66 m (12 ft) wide with a matte white surface well shaded from extraneous light, and properly adjusted to the floor on which the vehicle stands. Provisions may be made for moving the screen so it can be aligned parallel with the vehicle.
  3. The screen shall be provided with a fixed vertical centerline, 2 laterally adjustable vertical tapes, and 1 vertically adjustable horizontal tape.
  4. If a regular commercial aiming screen is not available, the screen may consist of a vertical wall having a clear uninterrupted area approximately 1.83 m (6 ft) high and 3.66 m (12 ft) wide. The surface should be finished with a washable non-gloss white paint.
  5. After the aiming screen has been set up in its permanent location, it is necessary to paint a reference line on the floor directly under the lens of the lamps to indicate the proper location of the headlamps when they are being aimed: Distance between headlamps (1) Center line of screen (2) Adjustable vertical pointer (3) Adjustable horizontal tape (4) Diagram of light screen (5) Vertical center line ahead of right headlamp pointer position (6) 7.62 m (25 ft) (7) Car centerline axis (8)

Prior to aiming the headlamps, the following steps must be taken

  1. Remove any snow, ice or mud from the vehicle.
  2. The vehicle must have a full tank of gas.
  3. Stop all other work on the vehicle.
  4. If any service has been performed on the vehicle, make sure that all of the components are back in their original place.
  5. The vehicle must be on a level surface.
  6. The vehicle left tires must be aligned with the reference line extending from the screen with the headlamps aligned with the vertical reference line (2).
  7. Do not load any cargo in the vehicle.
  8. The vehicle must contain 1 person or 72.56 kg (160 lb) on the driver's seat.
  9. Inflate the tires to the proper pressure.
  10. Simulate the vehicle loads if the intended use of the vehicle is for hauling heavy loads or towing a trailer.
  11. Rock the vehicle in order to stabilize the suspension.
  12. Turn ON the headlamps to low beam and observe the left and the top edges of the high intensity zone on the screen. The edges of the high intensity zone should fall within the specifications.

Headlamp Aiming Procedure

  1. Open the hood.
  2. Measure from the floor to the center of the headlamp bulb, some headlamps have an aim dot marked on the headlamp lens.
  3. At the screen, measure from the floor and place the horizontal tape at the measured distance.
  4. Measure from the reference line on the floor to the left headlamp bulb centerline.
  5. At the screen, measure from the reference line and place the vertical tape at the measured distance.
  6. Measure from the reference line on the floor to the right headlamp bulb centerline.
  7. At the screen, measure from the reference line and place the vertical tape at the measured distance.
  8. Turn on the low beam headlamps and block the light from projecting onto the screen from the passenger side headlamp.
  9. Adjust the vertical aim of the headlamps to the specifications required by the state and the local authorities, or as shown in step number 8.
  10. Rotate the headlamp adjuster to change the vertical aim of the headlamp.
  11. Repeat the aiming procedure for the passenger side headlamp while blocking the light from projecting onto the screen from the driver side headlamp.
  12. Close the hood.

Scheme 22

Scheme 22: Front Fog Lamp Replacement (Base/SS)
Scheme 22: Front Fog Lamp Replacement (Base/SS)
CalloutComponent Name
Preliminary Procedures Remove the front wheel liner. Refer to Front Wheelhouse Liner Replacement . Remove the fog lamp bezel. Refer to Front Fog Lamp Bezel Replacement . Using a blunt tool, push outward and release the fog lamp from the three ball retainers securing the fog lamp to the front bumper fascia.
1Forward Lamp Harness Electrical Connector WARNING: Refer to Halogen Bulb Warning .
2Front Fog Lamp Assembly Tip: Reset the ball retainers into the front bumper fascia prior to installing the fog lamp.
WARNING
Refer to Halogen Bulb Warning .

Scheme 23

Scheme 23: Front Fog Lamp Bulb Replacement (Base/SS)
Scheme 23: Front Fog Lamp Bulb Replacement (Base/SS)
CalloutComponent Name
Preliminary Procedure: Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
1Front Fog Lamp Electrical Connector Tip: Disconnect the fog lamp electrical connector from the fog lamp projector.
2Front Fog Lamp Bulb WARNING: Refer to Halogen Bulb Warning . Tip: Release the fog lamp bulb from the electrical harness connector.
WARNING
Refer to Halogen Bulb Warning .

Adjustment Procedure

Proper road illumination and safety require the fog lamps to be aimed. The front fog lamp aim should be checked when a new front fog lamp assembly is installed, or if any service repairs have been performed to the vehicle which disturb the front fog lamp mounting or the vehicle ride height.

There are no horizontal adjustments for aiming the front fog lamp assemblies on this vehicle.

  1. To ensure accurate vertical front fog lamp aiming, first perform the following steps to prepare the vehicle. Make sure that all the components are in place on the vehicle, the tires are properly inflated, and there is not any mud or snow clinging to the vehicle. Stop all other operations of work on the vehicle. Make sure the fuel level is 1/2 full or more. Jounce the vehicle to settle the suspension. Place the vehicle on a level surface 7.6 m (25 ft) from the target screen. Measure the distance from the floor to the center of the fog lamp (5). Using this measurement, mark the horizontal centerline of the fog lamp (1) on the target screen directly in front of the vehicle. Start the vehicle in order to level the electronic suspension. Turn off the vehicle.
  2. Turn the front fog lamps ON.
  3. Loosen the lower portion of the front wheelhouse liner in order to access and adjust the fog lamp projector aim beam.
  4. Adjust the fog lamp up or down until the top edge of the high intensity zone on the screen is 102 mm (4 in) below the horizontal centerline.
  5. Turn OFF the front fog lamps.
  6. Secure the lower front portion of the front wheelhouse liner.

Daytime Running Lamp Bulb Replacement (RS)

CalloutComponent Name
Preliminary Procedure: Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
1Forward Lamp Harness Connector Tip: Disconnect the forward lamp harness connector from the daytime running lamp bulb socket.
2Daytime Running Lamp Bulb WARNING: Refer to Halogen Bulb Warning . Tip: Rotate the bulb socket counterclockwise and remove from the (DRL) lamp projector.
WARNING
Refer to Halogen Bulb Warning .

Daytime Running Lamp Bulb Replacement (SS)

CalloutComponent Name
Preliminary Procedure: Open and support the hood assembly in order to reach and remove the headlamp bulb accessory covers and bulb sockets.
1Headlamp Bulb Accessory Cover Tip: Rotate the cover a quarter turn counter-clockwise and remove from the headlamp assembly.
2Daytime Running Lamp Bulb WARNING: Refer to Halogen Bulb Warning . Procedure Disconnect the electrical connector from the bulb socket. Rotate the bulb socket counterclockwise and remove from the headlamp assembly.
WARNING
Refer to Halogen Bulb Warning .

Scheme 24

Scheme 24: Daytime Running Lamp Replacement (RS)
Scheme 24: Daytime Running Lamp Replacement (RS)
CalloutComponent Name
Preliminary Procedures Remove the front wheel liner. Refer to Front Wheelhouse Liner Replacement . Disconnect the electrical connector from the daytime running lamp bulb socket. Remove the fog lamp bezel. Refer to Front Fog Lamp Bezel Replacement .
1Daytime Running Lamp Assembly Procedure Using a 10 mm, six point socket, push outward and release each of the daytime running lamp tabs from the front bumper fascia opening. Position and press the lamp assembly back into the front bumper fascia opening until all three lamp assembly tabs are secure to the front bumper fascia.

Scheme 25

Scheme 25: Front Side Marker Lamp Replacement
Scheme 25: Front Side Marker Lamp Replacement
CalloutComponent Name
Preliminary Procedures Remove the front wheelhouse front liner. Refer to Front Wheelhouse Liner Replacement . Insert a small flat-bladed tool into the front bumper fascia lower reinforcement in order to access the locking tab on the front marker lamp. Gently push the locking tab inward in order to release lamp from the bumper fascia assembly. Pull the front marker lamp outward from the front bumper fascia.
1Front Side Marker Lamp Assembly Tip: Disconnect the electrical connector socket after the lamp has been removed from the front bumper fascia.

Scheme 26

Scheme 26: Front Side Marker Lamp Bulb Replacement
Scheme 26: Front Side Marker Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the front side marker lamp assembly. Refer to Front Side Marker Lamp Replacement .
1Front Side Marker Lamp Bulb Tip: Pull the marker lamp bulb straight out of the lamp socket.

Scheme 27

Scheme 27: Rear Side Marker Lamp Replacement
Scheme 27: Rear Side Marker Lamp Replacement
CalloutComponent Name
Preliminary Procedure: Remove the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement .
1Rear Side Marker Lamp Procedure Depress the forward locking tab rearward on the lamp assembly. Rotate the forward edge outward from the rear bumper fascia. Pull the lamp slightly forward to release the tab. Disconnect the rear side marker lamp socket from the rear side marker lamp assembly.

Scheme 28

Scheme 28: Rear Side Marker Lamp Bulb Replacement
Scheme 28: Rear Side Marker Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the rear side marker lamp. Refer to Rear Side Marker Lamp Replacement .
1Rear Side Marker Lamp Socket Tip: Rotate and remove the lamp bulb socket from the lamp assembly.
2Rear Side Marker Lamp Bulb Tip: Pull the bulb straight out of the lamp socket.

Scheme 29

Scheme 29: Parking and Turn Signal Lamp Bulb Replacement
Scheme 29: Parking and Turn Signal Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the air cleaner assembly if removing the driver side park and turn signal lamp bulb. Refer to Air Cleaner Assembly Replacement .
1Park and Turn Signal Lamp Bulb Procedure Rotate the bulb socket counter-clockwise and remove from the headlamp assembly. Pull the bulb straight from the bulb socket.

Scheme 30

Scheme 30: High Mount Stop Lamp Replacement
Scheme 30: High Mount Stop Lamp Replacement
CalloutComponent Name
Preliminary Procedures Remove the rear window panel trim. Refer to Rear Window Panel Trim Replacement . Pull back the window panel acoustic trim filler in order to access the high mount stop lamp. Disengage the high mount stop lamp electrical connector from the rear window trim panel. Pull the high mount stop lamp from the rear window panel trim.
1High Mount Stop Lamp Tip: The high mount stop lamp is serviced as one part.

Scheme 31

Scheme 31: Cargo Lamp Bulb Replacement
Scheme 31: Cargo Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the rear compartment courtesy lamp. Refer to Rear Compartment Courtesy Lamp Replacement .
1Cargo Lamp Bulb Procedure: Pull the bulb straight out.

Scheme 32

Scheme 32: Backup Lamp Replacement
Scheme 32: Backup Lamp Replacement
CalloutComponent Name
Preliminary Procedures Remove the rear bumper fascia. Refer to Rear Bumper Fascia Replacement . Disconnect the electrical connector bulb socket from the back up lamp.
1Back Up Lamp Screw (Qty: 3) CAUTION: Refer to Fastener Caution . Tip: Flex the top of the rear bumper energy absorber in order to access the lower back up lamp screws. Tighten: 2.5 N.m (22 lb in)
2Back Up Lamp
CAUTION
Refer to Fastener Caution .

Scheme 33

Scheme 33: Backup Lamp Bulb Replacement
Scheme 33: Backup Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the rear bumper fascia. Refer to Rear Bumper Fascia Replacement .
1Back Up Lamp Bulb WARNING: Refer to Halogen Bulb Warning . Procedure Disconnect the electrical harness connector to the bulb socket. Rotate the bulb socket counter-clockwise. Remove and discard the bulb socket.
WARNING
Refer to Halogen Bulb Warning .

Scheme 34

Scheme 34: Rear License Plate Lamp Replacement
Scheme 34: Rear License Plate Lamp Replacement
CalloutComponent Name
Preliminary Procedure: Using a small flat-bladed tool, depress the inner license plate lamp tab and rotate downward in order to remove the lamp from the rear bumper fascia.
1License Plate Lamp
2License Plate Lamp Electrical Socket Connector
3License Plate Lamp Bulb Tip: Replace the bulb as needed.

Scheme 35

Scheme 35: Tail Lamp Replacement - Inboard
Scheme 35: Tail Lamp Replacement - Inboard
CalloutComponent Name
Preliminary Procedures Remove the tail lamp filler closeout panel. Refer to Tail Lamp Closeout Filler Replacement . Remove the tail lamp bezel. Refer to Tail Lamp Bezel Replacement . Disconnect the bulb socket from the tail lamp. Remove the three tail lamp nuts. Release the three locating tabs securing the tail lamp to the rear bumper fascia pocket. Push the tail lamp assembly outward from the rear bumper fascia.
1Tail Lamp Inboard Nut (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 2.5 N.m (22 lb in)
2Tail Lamp Bulb Socket WARNING: Refer to Halogen Bulb Warning .
3Tail Lamp Assembly Inboard
CAUTION
Refer to Fastener Caution .
WARNING
Refer to Halogen Bulb Warning .

Scheme 36

Scheme 36: Tail Lamp Replacement - Outboard
Scheme 36: Tail Lamp Replacement - Outboard
CalloutComponent Name
Preliminary Procedures Remove the tail lamp filler closeout panel. Refer to Tail Lamp Closeout Filler Replacement . Remove the tail lamp bezel. Refer to Tail Lamp Bezel Replacement . Disconnect the bulb socket from the tail lamp. Remove the three tail lamp nuts. Release the three locating tabs securing the tail lamp to the rear bumper fascia pocket. Push the tail lamp assembly outward from the rear bumper fascia.
1Tail Lamp Outboard Nut (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: Tighten the nuts to 2.5 N.m (22 lb in)
2Tail Lamp Bulb Socket WARNING: Refer to Halogen Bulb Warning .
3Tail Lamp Assembly Outboard
CAUTION
Refer to Fastener Caution .
WARNING
Refer to Halogen Bulb Warning .

Scheme 37

Scheme 37: Tail Lamp Bulb Replacement
Scheme 37: Tail Lamp Bulb Replacement
CalloutComponent Name
Preliminary Procedure: Remove the tail lamp closeout filler panel. Refer to Tail Lamp Closeout Filler Replacement .
1Tail Lamp Bulb Socket WARNING: Refer to Halogen Bulb Warning . Procedure Disconnect the electrical connector from the bulb socket prior to removing the socket. Rotate the bulb socket counter-clockwise and remove from the tail lamp assembly.
2Tail Lamp Bulb Tip: Pull the tail lamp bulb out of the tail lamp bulb electrical socket.
WARNING
Refer to Halogen Bulb Warning .

Scheme 38

Scheme 38: Rear Compartment Courtesy Lamp Replacement
Scheme 38: Rear Compartment Courtesy Lamp Replacement
CalloutComponent Name
1Rear Compartment Courtesy Lamp Procedure Open the rear compartment. Remove the rear compartment lamp using a small fat bladed tool to release the retaining tabs. Disconnect the electrical connector.

Exterior Lamps

The exterior lighting system consists of the following lamps

  1. The headlamps
  2. The front fog lamps
  3. The park, tail and marker lamps
  4. The turn signal/hazard lamps
  5. The stop lamps
  6. The backup lamps
  7. The cargo lamps

Headlamps

The headlamps may be turned ON in 2 different ways. First, when the driver places the headlamp switch in the HEADLAMP position, for normal operation. Second, with the headlamp switch placed in the AUTO position, for automatic lamp control (ALC).

Headlamp ON/OFF control is determined by the body control module (BCM) by a signal on the headlamp switch on input circuit when the headlamp switch is in the HEAD position. When the headlamp switch is in the AUTO position, the BCM determines headlamps ON/OFF by the voltage from the ambient light sensor.

If the headlight switch is left in the ON position, the inadvertent power control feature will turn OFF the headlights approximately 10 seconds after the ignition switch is turned to the OFF position. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the headlights will remain ON until turned OFF or the battery runs flat.

The high beam indicator is illuminated when the instrument cluster receives a GMLAN serial data message from the BCM that the high beams are illuminated.

High Beams

The high beam headlamps receive voltage from the headlamp high relay located in the underhood fuse block. The BCM controls the relay on the headlamp high beam relay control circuit. High beam control is determined by a signal on the headlamp dimmer switch high beam signal circuit from the turn signal multifunction switch. When the headlamp dimmer switch signal circuit is grounded, the BCM grounds the headlamp high beam relay control circuit, illuminating the high beam headlamps. The right and left high beam circuits are independent and are fused independently in the underhood fuse block.

Low Beams - Standard

The low beam headlamps receive voltage from the headlamp low beam relay located in the underhood fuse block. The BCM controls the relay on the headlamp low beam relay control circuit. Low beam control is activated when the headlamp switch is placed in the headlamp ON position grounding the headlamp switch headlamps on signal circuit to the BCM. The right and left low beam circuits are independent are fused independently in the underhood fuse block.

Fog Lamps

With both the ignition switch in the RUN position, and the park lamps ON, the fog lights will illuminate when the driver depresses the fog lamp switch. The BCM receives the park lamp ON signal from the interior park lamps supply voltage signal circuit. With the headlamp switch in either the park or headlamp position, and the fog lamp switch is in the ON position, the BCM will ground the fog lamp relay control circuit causing the relay to energize. The current flows from the fog lamp relay to both front fog lamps. The state of the fog lamps will remain the same until the fog lamp switch position is changed, or the ignition switch is cycled OFF and ON. Fog lamp operation will be cancelled whenever the park lamps are turned OFF or the high beam headlights have been selected.

Park, Tail and Marker Lamps

The park, tail and marker lamps, including the license lamps, are turned ON when the headlamp switch is placed in the PARK or HEAD position or anytime the headlights are requested. The underhood fuse block supplies battery positive voltage to both the park lamp relay switch contacts and the park lamp coil circuit. The BCM provides a ground or control circuit to the park lamp relay coil circuit. When the park lamps are turned ON, the BCM energizes the park lamp relay. If the headlight switch is left in the ON position, the inadvertent power control feature will turn OFF the park, tail and marker lamps approximately 10 seconds after the ignition switch is turned to the OFF position. If the driver places the headlight switch in the ON position after the ignition switch has been turned OFF, or if the ignition switch is in the ACCY position, the park, tail and marker lamps will remain ON until turned OFF or the battery runs flat.

Turn Signal/Hazard Lamps

When the turn signal multifunction switch is placed in either the left or right position, a ground signal is completed from the turn signal switch to the BCM. The BCM then sends an ON-OFF voltage signal through the fuses to the appropriate turn signal and side repeater lamps or to all of the turn signal fuses for hazard operation. An audio chime is also activated when the turn signals are ON. The instrument panel cluster (IPC) receives the signals to activate the turn signal indicators over the GMLAN serial data system. The hazard flashers may be activated in any power mode. The hazard switch signal circuit is momentarily grounded when the hazard switch is pressed. The BCM supplies battery voltage to all turn signal lamps in an ON and OFF duty cycle. When the hazard switch is activated, the BCM sends a serial data message to the instrument panel cluster requesting both turn signal indicators to be cycled ON and OFF.

Stop Lamps

When the driver presses the brake pedal, the a variable voltage signal from the brake pedal position sensor (BPPS) is supplied to the BCM. The BCM then supplies voltage to stop lamp supply voltage circuit applying power to the stop lamps and center high mount stop lamp (CHMSL). The BCM also supplies voltage to the transmission control module (TCM), and powertrain control module (ECM) through a dedicated circuit.

Backup Lamps

The backup lamp request signal is sent from the ECM to the BCM on the GMLAN serial data system. This signal is based on the park neutral position (PNP) switch signal. The BCM supplies voltage to the backup relay and to the automatic day/night mirror when the vehicle is in reverse. The backup relay supplies a voltage on the backup lamp supply voltage circuit to the backup lamps.

Cargo Lamps

The cargo lamp is controlled by the trunk ajar control circuit. There is not a separate switch to turn the cargo lamps ON and OFF.

Electrical Connections

Overloading the vehicles electrical system may damage the vehicles accessories. Do not overload the vehicles system by having unnecessary accessories at the same time.

High Intensity Discharge (HID) Low Beam Headlamps (Uplevel)

WARNINGThe high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly.

Battery voltage is applied at all times to the coil and switched side of the low beam relay. Ground is applied at all times to the headlamp switch. When the headlamp switch is placed in the HEAD position, ground is applied from the headlamp switch through the headlamps ON signal circuit to the body control module (BCM). The BCM applies ground to the headlamp low beam relay control circuit. This energizes the low beam relay coil, closing the switch side contacts, and applies battery voltage to the LEFT and RIGHT LOW BEAM fuses. Battery voltage is then applied from the fuses, through the low beam voltage supply circuits to the left and right headlamp ballast located in each headlamp assembly. When battery voltage is applied to the headlamp ballast through the low beam voltage supply circuits, the ballast charge the starter to start the lamp. High intensity discharge (HID) headlamps do not have filaments like traditional bulbs, instead the starter uses a high voltage transformer to convert the input voltage into a higher voltage. This increased voltage is used in order to create an arc between the electrodes in the bulb.

Run Up Of The Lamp

Each ballast requires higher amperage in order to ensure normal startup and run up of the lamp. Run up is the term used to describe the extra power level given to the bulb. The input current during the steady state operation is lower that the start up amperage. After the lamp receives the strike from the starter and the arc is established, the ballast uses its operating voltage in order to provide the run up power needed in order to keep the lamp on. The lamp rapidly increases in intensity from a dim glow to a very high-intensity, bright light called a steady state. Within a few seconds of the arc being established in the bulb, the majority of steady state is complete. 100 percent of the steady state is completed shortly there after. A high watt power level is necessary in order to bring the lamp to a steady state in such a short period of time. The high watt power level allows the lamp to meet the SAE light vs. time specification.

When To Change The HID Bulb

Bulb failure, end of life occurs when the bulb gets old and becomes unstable. The bulb may begin shutting itself off sporadically and unpredictably at first, perhaps only once during a 24-hour period. When the bulb begins shutting itself off occasionally, the ballast will automatically turn the bulb back on again within 0.5 seconds. The ballast will re-strike the bulb so quickly that the bulb may not appear to have shut off. As the bulb ages, the bulb may begin to shut off more frequently, eventually over 30 times per minute. When the bulb begins to shut off more frequently, the ballast receives excessive, repetitive current input. Repetitive and excessive restarts or re-strikes, without time for the ballast to cool down, will permanently damage the ballast. As a safeguard, when repetitive re-strikes are detected, the ballast will not attempt to re-strike the lamp. The ballast then shuts down and the bulb goes out.

The following symptoms are noticeable signs of bulb failure

  1. Flickering light, caused in the early stages of bulb failure.
  2. Lights go out, caused when the ballast detects excessive, repetitive bulb re-strike.
  3. Color change-The lamp may change to a dim pink glow.

Input power to the ballast must be terminated in order to reset the ballast's fault circuitry. In order to terminate the input power to the ballast, turn the lights off and back on again. Turning the lights off and back on again resets all of the fault circuitry within the ballast until the next occurrence of excessive, repetitive bulb re-strikes. When excessive, repetitive bulb re-strikes occur, replace the starter/arc tube assembly. The ballast will begin the start-up process when the starter/arc tube assembly is replaced. Repeatedly resetting the input power can overheat the internal components and cause permanent damage to the ballast. Allow a few minutes of cool-down time in between reset attempts.

Bulb failures are often sporadic at first, and difficult to repeat. Technicians can identify bulb failure by observing if the problem gets progressively worse over the next 100 hours of operation.

Light Color

White light has a different color rating than regular headlamps. The range of white light that is acceptable is broad when compared to halogens. Therefore, some variation in headlight coloring between the right and left headlamp will be normal. One high intensity discharge (HID) at the end of the normal range may appear considerably different in color from one at the other end of the range. Difference in color is normal. Replace the arc tube only if the arc tube is determined to be at the bulb failure stage.

Daytime Running Lamps (DRL) without HID

The daytime running lamps (DRL) will illuminate the right and left low beam headlamps continuously. The DRLs will operate when the following conditions are met

  1. The ignition is in the RUN or CRANK position.
  2. The shift lever is out of the PARK position.
  3. The high and low beam headlamps are OFF.

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON by applying ground to the left and right DRL relays via separate left and right DRL relay control circuits. When the BCM applies ground to the relay control circuits, the left and right DRL relay coils energize causing both relay switch contacts to close. With the left and right DRL relay switch contacts closed, battery voltage flows through the left and right DRL fuses to the left and right DRL lamps or low beam headlamps depending on the vehicles option content. Any function or condition that turns on the headlamps will cancel DRL operation.

Daytime Running Lamps (DRL) with HID

The daytime running lamps (DRL) will illuminate continuously when the following conditions are met

  1. The ignition is in the RUN or CRANK position.
  2. The shift lever is out of the PARK position.
  3. The high and low beam headlamps are OFF.

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON by applying ground to the left and right DRL relays via separate left and right DRL relay control circuits. When the BCM applies ground to the relay control circuits, the left and right DRL relay coils energize causing both relay switch contacts to close. With the left and right DRL relay switch contacts closed, battery voltage flows through the left and right DRL fuses to the left and right DRL lamps. Any function or condition that turns on the headlamps will cancel DRL operation.

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON by applying ground to the left and right DRL relays via separate left and right DRL relay control circuits. When the BCM applies ground to the relay control circuits, the left and right DRL relay coils energize causing both relay switch contacts to close. With the left and right DRL relay switch contacts closed, battery voltage flows through the left and right DRL fuses to the left and right DRL lamps. Any function or condition that turns on the headlamps will cancel DRL operation.

Interior Lamps

The interior lighting consists of 3 groups. The first group includes lamps that may not be dimmed.

  1. Courtesy/illuminated entry lamps
  2. Accent lamps
  3. Dome lamps

Courtesy/Illuminated Entry Lamps

The courtesy/illuminated entry lamps, may be manually turned ON or OFF by placing the interior lamp switch in the ON or OFF position. If an outside door handle is lifted and a door is opened, the courtesy/illuminated entry lamps illuminate. After all the doors have been closed the courtesy/illuminated entry lamps will remain illuminated approximately 15 seconds. The body control module (BCM) will then turn them OFF through the theater dimming feature. The courtesy/illuminated entry lamps will also turn ON prior to any door being opened, and remain illuminated approximately 40 seconds when the driver removes the ignition key. When the driver places the dome lamp defeat switch in the OFF position, the courtesy/illuminated entry lamps will be disabled.

The BCM, the door switches communicate through the GMLAN serial data circuit for the lamp illumination commands of the doors and luggage compartment open/ajar switch signals. For all vehicles, the left and right rear door latch switches are both on one circuit that is also an input to the BCM.

The left and right front door courtesy lamps receive voltage and ground from the driver door switch and the passenger door switch respectively. The remaining courtesy lamps are controlled and receive voltage from the BCM. Voltage for the courtesy lamp supply voltage circuit is from the INT LTS fuse in the instrument panel fuse block.

Accent Lamps - Driver Door, Passenger Door and Instrument Panel

The accent lamps operate very similarly to the courtesy/illuminated entry lamps. They may be manually turned ON or OFF by placing the interior lamp switch in the ON or OFF position. If an outside door handle is lifted and a door is opened, the accent lamps will illuminate. After all the doors have been closed the accent lamps will remain illuminated approximately 15 seconds. The body control module (BCM) will then turn them OFF through the theater dimming feature. The accent lamps will also turn ON prior to any door being opened, and remain illuminated approximately 40 seconds when the driver removes the ignition key.

Unlike the courtesy/illuminated entry lamps, the intensity of the accent lighting can be controlled through use of the instrument panel dimmer switch. The accent lamps will have the same lighting intensity as the other dimmable lighting.

The driver door and passenger door courtesy lamps receive voltage and ground from the driver door switch and the passenger door switch respectively.

Keyless Entry Interior Illumination

When the driver uses the door key in order to unlock the doors, the body control module (BCM) receives a door unlock signal. The BCM must have inputs or serial data messages that indicate that the ignition switch is OFF, the courtesy lamp switch is OFF and all the doors are closed. The BCM will then activate the interior lamps. The courtesy lamps will remain ON, approximately 15 seconds after the door is closed. The BCM will then turn them OFF through the theater dimming feature. If the door locks are activated to the LOCK position, or if the ignition switch is turned to either the RUN or CRANK position the courtesy lamps will turn OFF immediately.

When the driver uses the remote function actuator transmitter to unlock the doors, trunk or presses the panic button, the BCM will keep the courtesy lamps ON approximately 40 seconds. When the driver uses the remote function actuator transmitter to lock the doors, the BCM will keep the courtesy lamps on approximately 2 seconds. If the ignition switch is turned to either the RUN or CRANK position the courtesy lamps will turn OFF immediately.

Battery Rundown Protection/Inadvertent Power

The body control module (BCM) inadvertent power supply voltage circuit provides battery positive voltage to all of the courtesy lamps and cargo lamps if equipped. In the event that any of these lamps were to remain illuminated for a period of more than 10 seconds with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power supply voltage circuit to prevent a total battery discharge condition.

Interior Lamps Dimming

The second interior lighting group includes lamps which may be dimmed. This group may use a combination of LED illumination and incandescent lamps.

When the ignition switch is turned to the RUN position, the radio VF display turns ON at maximum brightness. When the park lamps are ON, all incandescent and LED back lighting turn ON at the dimming level indicated by the instrument panel (I/P) dimmer switch. At the same time all VF displays dim to match the indicated dimming level. The panel dimmer switch potentiometer is an input to the body control module (BCM). When the driver selects a dimming setting by moving the I/P dimming switch potentiometer, all incandescent back lighting lamps are provided with a specific voltage. When the I/P dimmer switch is moved from MIN to MAX, all VF displays, as well as all incandescent back lighting respond from minimum intensity to maximum brightness in response to the I/P dimmer switch.

The following switches and components have back lighting when the park lamps are ON

  1. The instrument panel cluster (IPC)
  2. Window and heated seat switches
  3. Sunroof switch
  4. Accessory switches
  5. Fog lamp switches
  6. Rear parking assist (RPA) disable switches
  7. PRNDL lamps
  8. Traction control switch
  9. Steering wheel control switches

The left and right front door switch illumination is controlled, receives voltage and ground from the driver door switch and passenger switch respectively. The radio is also a GMLAN module and has full control of its illumination. The BCM, door switches, and radio communicate through GMLAN serial data for the lamp illumination commands.

The various switches, HVAC control assembly, and the PRNDL lamps receive voltage and are controlled by the BCM on the I/P lamps dimming control circuit.

The following indicators receive voltage from the BCM and are controlled by ground from a switch or from various modules

  1. Radio
  2. HVAC control assembly
  3. Instrument panel cluster (IPC)
  4. Driver information center (DIC)
  5. Headlamp and panel dimmer switch

The indicators receive voltage from the BCM on the LED dimming circuit. Control for the indicators is from the various modules or switches. Voltage for the LED dimming supply circuit, instrument panel lamps dimming control circuit and the instrument panel lamps dimming supply circuit is from the BCM.

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Accessory Wiring Junction Block Retainer Replacement
• Radio Control Assembly Replacement
• Turn Signal Multifunction Switch Replacement
• Checking Aftermarket Accessories
• Backup Lamp Switch Replacement
• Door Ajar Indicator Malfunction
• Fastener Caution
• Instrument Panel Center Air Outlet Grille Replacement
• Front Side Door Trim Panel Replacement
• Halogen Bulb Warning
• Front Bumper Fascia Replacement
• Front Wheelhouse Liner Replacement
• Front Fog Lamp Bezel Replacement
• Air Cleaner Assembly Replacement
• DTC B2530
• Daytime Running Lamp Bulb Replacement (RS)
• Daytime Running Lamp Bulb Replacement (SS)
• Brake Pedal Position Sensor Calibration
• Brake Pedal Position Sensor Replacement