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Object Detection System and Pedestrian Protection System Cadillac ELR I

Collision/avoidance 19 illustrations ~23634 words

Scheme 1

Scheme 1: Front Park Assist (UDF)
Scheme 1: Front Park Assist (UDF)

Scheme 2

Scheme 2: Rear Park Assist (UD7)
Scheme 2: Rear Park Assist (UD7)

Scheme 3

Scheme 3: Rearview Camera (UVC)
Scheme 3: Rearview Camera (UVC)

Scheme 4

Scheme 4: Forward Collision (UEU) and Lane Departure (UFL)
Scheme 4: Forward Collision (UEU) and Lane Departure (UFL)

Scheme 5

Scheme 5: Side Object Detection (UFT)
Scheme 5: Side Object Detection (UFT)

Scheme 6

Scheme 6: Safety Alert Seat (A45)
Scheme 6: Safety Alert Seat (A45)

Scheme 7

Scheme 7: Pedestrian Protection System
Scheme 7: Pedestrian Protection System

Diagnostic Code Index

DTCDescription
DTC B010EDTC B010E: Pedestrian Friendly Alert Audio Output Circuit
DTC B094CDTC B094C Right Side Object Detection Control Module
DTC B0954, B0955, B0956, or B0957DTC B0954 01 Parking Assist Front Sensor Left Corner Circuit Short to Battery DTC B0954 06 Parking Assist Front Sensor Left Corner Circuit Low Voltage/Open DTC B0954 08 Parking Assist Front Sensor Left Corner Circuit Performance - Signal Invalid DTC B0954 21 Parking Assist Front Sensor Left Corner Circuit Incorrect Period DTC B0954 3A Parking Assist Front Sensor Left Corner Circuit Incorrect Component Installed DTC B0955 01 Parking Assist Front Sensor Left Middle Circuit Short to Battery DTC B0955 06 Parking Assist Front Sensor Left Middle Circuit Low Voltage/Open DTC B0955 08 Parking Assist Front Sensor Left Middle Circuit Performance - Signal Invalid DTC B0955 21 Parking Assist Front Sensor Left Middle Circuit Incorrect Period DTC B0955 3A Parking Assist Front Sensor Left Middle Circuit Incorrect Component Installed DTC B0956 01 Parking Assist Front Sensor Right Middle Circuit Short to Battery DTC B0956 06 Parking Assist Front Sensor Right Middle Circuit Low Voltage/Open DTC B0956 08 Parking Assist Front Sensor Right Middle Circuit Performance - Signal Invalid DTC B0956 21 Parking Assist Front Sensor Right Middle Circuit Incorrect Period DTC B0956 3A Parking Assist Front Sensor Right Middle Circuit Incorrect Component Installed DTC B0957 01 Parking Assist Front Sensor Right Corner Circuit Short to Battery DTC B0957 06 Parking Assist Front Sensor Right Corner Circuit Low Voltage/Open DTC B0957 08 Parking Assist Front Sensor Right Corner Circuit Performance - Signal Invalid DTC B0957 21 Parking Assist Front Sensor Right Corner Circuit Incorrect Period DTC B0957 3A Parking Assist Front Sensor Right Corner Circuit Incorrect Component Installed
DTC B0958, B0959, B0960, or B0961DTC B0958 01 Parking Assist Rear Sensor Left Corner Circuit Short to Battery DTC B0958 06 Parking Assist Rear Sensor Left Corner Circuit Low Voltage/Open DTC B0958 08 Parking Assist Rear Sensor Left Corner Circuit Performance - Signal Invalid DTC B0958 21 Parking Assist Rear Sensor Left Corner Circuit Incorrect Period DTC B0958 3A Parking Assist Rear Sensor Left Corner Circuit Incorrect Component Installed DTC B0959 01 Parking Assist Rear Sensor Left Middle Circuit Short to Battery DTC B0959 06 Parking Assist Rear Sensor Left Middle Circuit Low Voltage/Open DTC B0959 08 Parking Assist Rear Sensor Left Middle Circuit Performance - Signal Invalid DTC B0959 21 Parking Assist Rear Sensor Left Middle Circuit Incorrect Period DTC B0959 3A Parking Assist Rear Sensor Left Middle Circuit Incorrect Component Installed DTC B0960 01 Parking Assist Rear Sensor Right Middle Circuit Short to Battery DTC B0960 06 Parking Assist Rear Sensor Right Middle Circuit Low Voltage/Open DTC B0960 08 Parking Assist Rear Sensor Right Middle Circuit Performance - Signal Invalid DTC B0960 21 Parking Assist Rear Sensor Right Middle Circuit Incorrect Period DTC B0960 3A Parking Assist Rear Sensor Right Middle Circuit Incorrect Component Installed DTC B0961 01 Parking Assist Rear Sensor Right Corner Circuit Short to Battery DTC B0961 06 Parking Assist Rear Sensor Right Corner Circuit Low Voltage/Open DTC B0961 08 Parking Assist Rear Sensor Right Corner Circuit Performance - Signal Invalid DTC B0961 21 Parking Assist Rear Sensor Right Corner Circuit Incorrect Period DTC B0961 3A Parking Assist Rear Sensor Right Corner Circuit Incorrect Component Installed
DTC B0967 or B0968DTC B0967 02 Parking Assist On/Off Switch Circuit Short to Ground DTC B0968 01 Parking Assist On/Off Switch Indicator Circuit Short to Battery DTC B0968 06 Parking Assist On/Off Switch Indicator Circuit Low Voltage/Open
DTC B0987DTC B0987 01 Vehicle Direction Camera Indicator Circuit Short to Battery DTC B0987 06 Vehicle Direction Camera Indicator Circuit Low Voltage/Open
DTC B1011DTC B1011 System Disabled Information Stored
DTC B1015DTC B1015 00 Vehicle Identification Number Information Malfunction
DTC B101D (with side blind zone alert, UFT)DTC B101D Electronic Control Unit Hardware
DTC B127BB127B 2B Rearview Camera Input Signal Circuit Missing Reference
DTC B1405DTC B1405 02 Control Module Voltage Reference Output 2 Circuit Short to Ground DTC B1405 03 Control Module Voltage Reference Output 2 Circuit Low Voltage DTC B1405 07 Control Module Voltage Reference Output 2 Circuit High Voltage
DTC B356ADTC B356A 02 Vehicle Direction Warning Switch Circuit Short to Ground
DTC B390DDTC B390D 66 Frontview Camera Module Incorrect Mounting

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC Descriptor

Symptom Byte 04 - Open

Symptom Byte 1B - Signal Cross Coupled

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
B+11
Signal +B010E 1BB010E 041
SignalB010E 1BB010E 041
Ground1
1. Pedestrian Alert System Inoperative

Circuit/System Description

Due to the lack of audible engine noise, hybrid and electric vehicles are very quiet at low speeds. The pedestrian alert system emits an audible sound at speeds less than 34 km/h to alert pedestrians that the vehicle is approaching. The sound will fade in and out and vary in pitch depending on vehicle speed. The K132 Pedestrian Alert Sound Control Module is supplied with B+ and ground. It communicates using serial data. The module outputs a signal to the P48 Pedestraian Alert Sound Speaker.

Conditions for Running the DTC

  1. Vehicle Power Mode: RUN
  2. Battery voltage between 9-16V
  3. Pedestrian alert system generating sound.

Conditions for Setting the DTC

B010E 04

The Pedestrian Alert Sound Control Module has detected an open in the Pedestrian Alert Sound Speaker circuit.

B010E 1B

The Pedestrian Alert Sound Control Module has detected a short in the Pedestrian Alert Sound Speaker circuit.

Action Taken When the DTC Sets

  1. The Pedestrian Alert System is disabled.
  2. Service Pedestrian Friendly Alert indicator is ON.

Conditions for Clearing the DTC

Fault not present.

DTC will clear after 100 fault-free ignition cycles.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON.
  2. Verify the P48 Pedestrian Alert Sound Speaker turns on and off when commanding the Pedestrian Alert Sound When Driving Forward parameter On and Off with a scan tool. If the speaker does not turn ON and OFF Refer to Circuit/System Testing. If the speaker does turns ON and OFF
  3. All OK.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the P48 Pedestrian Alert Sound Speaker. Ignition ON,.
  2. Command Pedestrian Alert Sound When Driving Forward parameter On with a scan tool.
  3. Test for 5-7 V between each audio signal circuit terminal 1 and terminal 2 and ground. If less than 5 V Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K132 Pedestrian Alert Sound Control Module. If greater than 7 V Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module. Ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K132 Pedestrian Alert Sound Control Module. If between 5-7 V
  4. Test for 49-51 Hz AC between each signal circuit terminal 1 and terminal 2 and ground. If not between 49-51 Hz AC Replace the K132 Pedestrian Alert Sound Control Module. If between 49-51 Hz AC
  5. Test or replace the P48 Pedestrian Alert Sound Speaker.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Pedestrian Sound Alert Speaker Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Pedestrian Alert Sound Control Module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

B218R Side Object Sensor Module - Right communicates on a private communication data bus with the B218L Side Object Sensor Module - Left. The B218L Side Object Sensor Module - Left is the master and can set this code if the B218R Side Object Sensor Module - Right determines it has an internal fault. DTC U18A6 will set if the left module is unable to communicate with the right side module.

Ignition ON.

The B218R Side Object Sensor Module - Right has detected an internal malfunction.

  1. The side object sensor system is disabled..
  2. The DIC will display "Service Side Detection System".
  1. A current DTC clears when the malfunction is no longer present.
  2. A history DTC clears when the control module ignition cycle counter reaches the reset threshold of 40, without a repeat of the malfunction.

Diagnostic Aids

  1. The modules are not identical and cannot be swapped from side to side.
  2. This DTC may be stored as a history DTC without affecting the operation of the B218R Side Object Sensor Module - Right.
  3. Do not replace B218R Side Object Sensor Module - Right based only on DTC B094C being set in history.
  4. If DTC B094C is set as current, replace the B218R Side Object Sensor Module - Right.
  5. B218R Side Object Sensor Module - Right communicates on a private communication data bus with the B218L Side Object Sensor Module - Left. If programming is needed for module replacement, you must program B218L Side Object Sensor Module - Left which will then in turn program B218R Side Object Sensor Module - Right.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that B094C is not set. If DTC is set Replace the B218R Side Object Sensor Module - Right. If the DTC is not set
  3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for side object sensor module replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
8 V ReferenceB1405 02B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Front Object Sensor SignalB0954 06B0954 06B0954 01B0954 08, B0954 21
Left Middle Front Object Sensor SignalB0955 06B0955 06B0955 01B0955 08, B0955 21
Right Middle Front Object Sensor SignalB0956 06B0956 06B0956 01B0956 08, B0956 21
Right Front Object Sensor SignalB0957 06B0957 06B0957 01B0957 08, B0957 21
Low ReferenceB0954 01, B0955 01, B0956 01, B0957 01, B0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The front and rear parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The front and rear parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the front and rear parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

  1. Ignition ON
  2. The park assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.

B0954 01, B0955 01, B0956 01, or B0957 01

The front and rear parking assist control module has detected the voltage at the sensor circuit is greater than 11.5 V or the object sensor is not grounded.

B0954 06, B0955 06, B0956 06, or B0957 06

The front and rear parking assist control module has detected the voltage at the sensor circuit is less than 0.5 V.

B0954 08, B0955 08, B0956 08, or B0957 08

The front and rear parking assist control module has received an invalid signal.

B0954 21, B0955 21, B0956 21, or B0957 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0954 3A, B0955 3A, B0956 3A, or B0957 3A

The front and rear parking assist control module determines the wrong sensor type is installed.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B1405 is not set. If the DTC is set Refer to «DTC B1405»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) If the DTC is not set
  3. Verify that DTC B0954 01, B0955 01, B0956 01, B0957 01 B0954 21, B0955 21, B0956 21 or B0957 21 is not set. If the DTC is set Verify the B78 Front Object Sensors are not contaminated with snow, mud, dirt, slush, or ice. If contaminated, clean sensor. If there is no contamination Refer to Circuit/System Testing. If the DTC is not set
  4. Verify that DTC B0954 3A, B0955 3A, B0956 3A or B0957 3A is not set. If the DTC is set Replace the B78 Front Object Sensor with the correct sensor type. If the DTC is not set
  5. Ignition ON, transmission in REVERSE.
  6. Verify the scan tool Parking Assist System Status parameter displays Enabled. If the Parking Assist System displays Disabled Refer to Circuit/System Testing. If the Parking Assist System displays Enabled
  7. All OK.
  1. Ignition OFF, scan tool disconnected, disconnect the harness at the appropriate B78 Front Object Sensor. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector X3 at the K41 Front and Rear Parking Assist Control Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms replace the K41 Front and Rear Parking Assist Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Test for 7.5-9.5 V between the 8 V reference circuit terminal 1 and ground. If less than 7.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If greater than 9.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module. If between 7.5-9.5 V
  5. Ignition OFF, remove appropriate B78 Front Object Sensor and switch locations with another properly operating sensor. Connect harness connector at both sensors. Ignition ON.
  6. Verify the DTC is set for the new location in which the malfunctioning sensor is installed. If DTC set for the new location Replace the malfunctioning B78 Front Object Sensor. If DTC set for the original location Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If no DTC set
  7. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Front Parking Assist Alarm Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Rear Parking Assist Alarm Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

  1. Ignition ON
  2. The parking assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.

B0958 01, B0959 01, B0960 01, or B0961 01

The parking assist control module has detected the voltage at the sensor circuit is greater than 11.5 V or the object sensor is not grounded.

B0958 06, B0959 06, B0960 06, or B0961 06

The parking assist control module has detected the voltage at the sensor circuit less than 0.5 V.

B0958 08, B0959 08, B0960 08, or B0961 08

The parking assist control module has received an invalid signal.

B0958 21, B0959 21, B0960 21, or B0961 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0958 3A, B0959 3A, B0960 3A, or B0961 3A

The parking assist control module determines the wrong sensor type is installed.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B1405 is not set. If the DTC is set Refer to «DTC B1405»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) If the DTC is not set
  3. Verify that DTC B0958 01, B0959 01, B0960 01 or B0961 01 is not set. If the DTC is set Check the appropriate sensor for contamination with mud. If no contamination is diagnosed, refer to Circuit/System Testing. If the DTC is not set
  4. Verify that DTC B0958 21, B0959 21, B0960 21 or B0961 21 is not set. If the DTC is set Check the appropriate sensor for contamination with mud, ice or snow. If no contamination is diagnosed, replace the sensor. If the DTC is not set
  5. Verify that DTC B0958 3A, B0959 3A, B0960 3A or B0961 3A is not set. If the DTC is set Replace the appropriate sensor with a sensor of correct sensor type. If the DTC is not set
  6. Ignition ON, transmission in REVERSE, verify the scan tool Parking Assist System Status parameter displays Enabled. If the Parking Assist System displays Disabled Refer to Circuit/System Testing. If the Parking Assist System displays Enabled
  7. All OK.
  1. Ignition OFF for 1 min, scan tool must be disconnected for steps 1 and 2 to allow module to power down. Disconnect the harness connector at the affected rear object sensor.
  2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector X2 at the K41 Front and Rear Parking Assist Control Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms replace the K41 Front and Rear Parking Assist Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Test for 7.5-9.5 V between the 8 V reference circuit terminal 1 and ground. If less than 7.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If greater than 9.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module. If between 7.5-9.5 V
  5. Ignition ON.
  6. Test for 4.8-5.2 V between the signal circuit terminal 3 and ground. If less than 4.8 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If greater than 5.2 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module. If between 4.8-5.2 V
  7. Test or replace the affected Rear Object Sensor.

Perform the Diagnostic Repair Verification after completing the repair

  1. «Rear Parking Assist Alarm Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Parking Assist Switch Indicator PWM ControlB0987 06, 2B0987 06, 2
Parking Assist Switch SignalB0967 02, 111
Parking Assist Switch Indicator Control222
Parking Assist Switch Ground1
1. Parking Assist Switch Malfunction 2. Parking Assist Indicator Malfunction

The parking assist can be enabled/disabled by pressing the parking assist switch. If the parking assist is enabled, engaging the reverse gear activates the park assist feature. By subsequently pressing the parking assist switch the parking assist can be disabled again. The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, parking assist is enabled.

The parking assist feature is enabled by the parking assist switch pulling the signal circuit from the front and rear parking assist control module to ground. The LED is illuminated by the front and rear parking assist control module providing the ground to the LED.

  1. Ignition ON
  2. The parking assist is activated. The activation takes place by putting in the reverse gear while the system is enabled.

B0967 02

The front and rear parking assist control module has detected a short to ground.

B0968 01

The front and rear parking assist control module has detected a short to battery.

B0968 06

The front and rear parking assist control module has detected a short to ground or open.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the scan tool Parking Assist Switch parameter changes between Active and Inactive when cycling the parking assist switch. If the Parking Assist Switch parameter does not change between Active and Inactive Refer to Parking Assist Switch Malfunction. If the Parking Assist Switch parameter changes between Active and Inactive
  3. Verify the park assist switch indicator turns ON and OFF when cycling the parking assist switch. If the indicator does not turn ON and OFF Refer to Parking Assist Switch Indicator Malfunction. If the indicator turns ON and OFF
  4. All OK.

Parking Assist Switch Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Park Assist Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector X1 at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the K41 Front and Rear Parking Assist Control Module signal circuit terminal 8 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41 Front and Rear Parking Assist Control Module. If Inactive
  5. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
  6. Verify the scan tool Park Assist Switch parameter is Active. If not Active Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If Active
  7. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.

Parking Assist Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel, ignition ON.
  2. Verify a test lamp illuminates when placed between the PWM voltage control terminal 3 and ground. NOTE: Verify vehicle interior dimming control is set all the way bright. If test lamp does not illuminate Refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) If the test lamp illuminates
  3. Connect a test lamp between PWM voltage control circuit terminal 3 and the control circuit terminal 2
  4. Verify the test lamp turns ON and OFF while commanding the Parking Assist Switch LED output control On and Off with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41 Front and Rear Parking Assist Control Module. If the test lamp turns ON and OFF
  5. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.

Component Testing

Park Assist Switch

Static Test

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
  2. Test for infinite resistance between the signal terminal 6 and the ground terminal 5. If not infinite resistance Replace the S48D Multifunction Switch 2 - Instrument Panel. If infinite resistance
  3. Test for less than 10 ohms between the signal terminal 6 and the ground terminal 5 while pressing the park assist switch. If not less than 10 ohms Replace the S48D Multifunction Switch 2 - Instrument Panel. If less than 10 ohms
  4. All OK

Perform the Diagnostic Repair Verification after completing the repair

  1. «Instrument Panel Multifunction Switch Replacement»(/cadillac/elr/i-2013-2015/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Lane Departure Warning Switch Indicator IgnitionB0987 06B0987 06
Lane Departure Warning Switch Indicator ControlB0987 06B0987 06B0987 01

The lane departure warning is enabled and disabled through a switch located in the left steering wheel controls switch. When enabled, the frontview camera module will illuminate the indicator located in the switch.

Ignition ON.

The frontview camera module has detected a short to battery or open/high resistance in the control circuit.

  1. Lane departure warning is disabled.
  2. SERVICE FRONT CAMERA is displayed on the driver information center.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B356A is not set. If the DTC is set Refer to «DTC B356A»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If the DTC is not set
  3. Verify the lane departure warning indicator turns ON and OFF while pressing and releasing the lane departure warning switch. If the indicator does not turn ON and OFF Refer to Circuit/System Testing. If the indictor turns ON and OFF
  4. All OK.
  1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left, ignition ON. NOTE: Verify interior lighting dimming is turned all the way up.
  2. Test for 6.2-12.0 V between the dimming control circuit terminal 4 and ground. If less than 6.2 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If greater than 12.0 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If between 6.2-12.0 V
  3. Connect a test lamp between the control circuit terminal 5 and B+.
  4. Verify the test lamp turns ON and OFF when commanding the Lane Departure Warning Indicator parameter ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If the test lamp turns ON and OFF
  5. Test or replace the S70L Steering Wheel Controls Switch - Left.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Cruise Control Switch Replacement»(/cadillac/elr/i-2013-2015/remont/cruise-control-systems/#cruise-control-system) - Steering Wheel Controls Switch - Left replacement.
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Frontview Camera Module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The front view camera module permanently monitors the serial data bus for error messages. When a malfunction is detected by the front view camera module, the system will be disabled and an error message will be stored in the front view camera module disable history buffer which is used to store information about the front camera features that are disabled.

  1. Ignition ON
  2. Front view camera enabled

The front view camera module detects a malfunction.

  1. The front view camera module is disabled.
  2. The front view camera module disable history buffer stores information why the system was disabled.

The condition for setting the DTC is no longer present.

The front view camera module disable history buffers are used to store information about the front view camera module features that are disabled. The Buffers will only update if the disable condition changes.

Example: If the data received from the steering wheel angle sensor is Invalid across many ignition cycles then it will only appear in 1 history buffer and not all history buffers. If this condition is the current reason why the front view camera module is disabled then it will be set in front view camera module disable history buffer 1. If a new reason occurs, such as vehicle speed validity is invalid, then the invalid steering wheel angle sensor fault will shift into disable history buffer 2 and vehicle speed validity invalid will be in disable history buffer 1. Since there are only 4 disable history buffers, the invalid steering wheel angle sensor will age out if 4 other disable reasons occur since the last invalid steering wheel angle sensor event occurred. Front view camera module disable history buffer 1 contains the current reason that one of the front view camera module features is disabled.

The front view camera module disable history buffers can display the following values

  1. Lane Departure Warning Indicator Malfunction
  2. Lane Departure Warning Switch Malfunction
  3. Camera Obstructed
  4. Accelerator Pedal Position Out of Range
  5. Driven Wheel Speed Signal Invalid
  6. Non-Driven Wheel Speed Signal Invalid
  7. Brake Pedal Moderate Travel Signal Invalid
  8. Brake Pedal Initial Travel Position Achieved
  9. Lost Communication with Steering Wheel Angle Sensor Module
  10. Invalid Data Received From Steering Wheel Angle Sensor Module
  11. Forward Collision Alert Switch Malfunction
  12. Clutch Pedal Position (CPP) Sensor Performance
  13. Clutch Pedal Position (CPP) Sensor Performance
  14. Transmission Gear Engaged
  15. Acceleration Sensor Longitudinal Signal
  16. Invalid Data Received From Yaw Rate Sensor Module
  17. Power Mode Controlled by Backup Device
  18. System Power Mode
  19. Overvoltage
  20. Undervoltage
  21. Undefined

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Verify no DTC is set. If a DTC is present, diagnose this first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Verify the scan tool Vehicle Direction Camera System parameter is NORMAL. If not the specified value, refer to «Lane Departure Warning System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , and «Forward Collision Alert System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .
  3. Verify the scan tool Vehicle Direction Camera Calibration Status parameter is CALIBRATED. If not the specified value, calibrate the K109 Frontview Camera Module. Refer to «Front View Camera Module Calibration»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__front-view-camera-module-calibration) .

Note. Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.

  1. Verify the scan tool Front View Camera Module Disable History displays no current malfunction. Refer to Diagnostic Aids. If a current malfunction is displayed, diagnose the system that sets the malfunction.
  2. If no malfunction is displayed in the Front View Camera Module Disable History, refer to «Lane Departure Warning System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , and «Forward Collision Alert System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for front view camera module programming and setup

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the parking assist control module and the frontview camera module receives the vehicle identification number (VIN) from the body control module. The modules will compare the VIN received to the VIN stored in memory.

Ignition voltage is between 9-16 V.

The stored VIN does not match the received VIN.

  1. The parking assist system or the lane departure warning system is disabled.
  2. The driver information center displays SERVICE PARK ASSIST or SERVICE FRONT CAMERA.

The stored VIN matches the VIN stored in the body control module.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the DTC B1015 is not. If the DTC B1015 is set Program the control module the DTC originally set in. Verify the DTC does not set. If the DTC is sets, replace the control module the DTC set in. If the DTC does not set All OK If the DTC B1015 is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair

Control Module References for the parking assist control module, frontview camera module replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

The side detection system uses two modules B218L Side Object Sensor Module - Left and B218R Side Object Sensor Module - Right. The left module is the master and is on the vehicle's serial data bus and communicates to the right module on a private bus. The internal fault detection is handled inside the B218L Side Object Sensor Module - Left. No external circuit diagnosis is involved.

  1. The B218L Side Object Sensor Module - Left runs the program to detect an internal fault when power up is commanded.

The B218L Side Object Sensor Module - Left has detected an internal malfunction.

  1. The side object sensor system is disabled.
  2. The driver information center displays SERVICE SIDE DETECTION SYSTEM
  1. A current DTC clears when the malfunction is no longer present.
  2. A history DTC clears when the device ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.
  1. This DTC may be stored as a history DTC without affecting the operation of the B218L Side Object Sensor Module - Left.
  2. Do not replace B218L Side Object Sensor Module - Left based only on DTC B101D being set in history.
  3. If DTC B101D is set as current, replace the B218L Side Object Sensor Module - Left.
  4. Since the left module is the master, if it is replaced, there still may be a problem with the right side as the module may have been unable to report it. Once the left module is replaced, check DTCs and verify operation of the system to assure proper functionality.

Schematic Reference

  1. «Data Communication Schematics»(/cadillac/elr/i-2013-2015/remont/communication-devices/#data-communication-system-schematic-wiring-diagrams)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references)

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B101D is not set. If DTC B101D is set Replace the B218L Side Object Sensor Module - Left. Verify no new DTCs set and side object system operates properly. If there are new DTCs refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) , or if the system does not operate properly, refer to «Symptoms - Object Detection»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__symptoms-object-detection) . If there are no new DTCs and the side object system operates properly If DTC B101D is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for B218L Side Object Sensor Module - Left replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Ignition1B127B 2B
Backup Signal1B127B 2B2
Camera Module signal +111
Camera Module signal3B127B 2B1
GroundB127B 2B
Shield3B127B 2B3
1. Rear Vision Camera Malfunction 2. Rear Vision Camera image always displayed 3. Poor Quality Image

When the vehicle is placed in reverse with the engine running, a voltage signal is sent to the rearview camera to turn on and send a video signal to the Human Machine Interface Control Module. If the Human Machine Interface Control Module does not see a signal from the camera it will set B127B 2B and display "Service Rear Vision System".

The vehicle must be in reverse with the engine running.

B127B 2B

Signal from the rearview camera not received by the Human Interface Machine Control Module for 2.5s.

  1. The Human Interface Machine Control Module commands the driver information center to display "Service Rear Vision System".
  2. The Human Interface Machine Control Module stores the DTC in memory.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 40 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B2545 is not set. If the DTC is set Refer to «DTC B2545»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the DTC is not set
  3. Verify the rearview camera has no debris on the lens and that the bezel and bezel seal are not damaged. If debris is found on the lens Clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary. If no debris on the lens
  4. Ignition ON, transmission in R.
  5. Verify the backup lamps are illuminated. If the backup lamps are not illuminated Refer to «Backup Lamps Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the backup lamps are illuminated
  6. Engine running, transmission in R.
  7. Verify a clear rear vision image is displayed on the P17 Info Display Module. If a clear image is not displayed Refer to Circuit/System Testing. If a clear image is displayed
  8. All OK.

Note. Circuit/System Verification must be performed before Circuit/System Testing. Under normal operating conditions the Human Interface Machine Control Module will become very hot. The module should be allowed to cool down prior to removal for any service procedure.

  1. Ignition OFF, disconnect the harness connector at the B87 Rearview Camera.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse. Refer to «Power Mode Mismatch»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B87 Rearview Camera. If the test lamp illuminates
  5. Engine running, park brake applied, transmission in R.
  6. Test for greater than 11 V between the control circuit terminal 3 and ground. If less than 11 V Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If greater than 11 V
  7. Ignition OFF, disconnect the X2 harness connector at the K74 Human Interface Control Module, ignition ON.
  8. Test for less than 1 V between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1 B87 Rearview Camera signal (-) circuit terminal 4 If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  9. Test for infinite resistance between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1 B87 Rearview Camera signal (-) circuit terminal 4 If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  10. Test for less than 2 ohms in the signal (+) circuit end to end. If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
  11. Test for less than 2 ohms in the signal (-) circuit end to end. If 2 ohms or greater Test the signal circuit for an open/high resistance. If less than 2 ohms
  12. Replace the B87 Rearview Camera.
  13. Engine running, transmission in R, verify a clear rear vision image is displayed on the P17 Info Display Module. If a clear rear vision image is not displayed Replace the K74 Human Interface Control Module. If a clear rear vision image is displayed
  14. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Rearview Driver Information Camera Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Body Control Module and Human Interface Control Module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
8 V ReferenceB1405 02B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Front Object Sensor SignalB0954 06B0954 06B0954 01B0954 08, B0954 21
Left Middle Front Object Sensor SignalB0955 06B0955 06B0955 01B0955 08, B0955 21
Right Middle Front Object Sensor SignalB0956 06B0956 06B0956 01B0956 08, B0956 21
Right Front Object Sensor SignalB0957 06B0957 06B0957 01B0957 08, B0957 21
Left Rear Object Sensor SignalB0958 06B0958 06B0958 01B0958 08, B0958 21
Left Middle Rear Object Sensor SignalB0959 06B0959 06B0959 01B0959 08, B0959 21
Right Middle Rear Object Sensor SignalB0960 06B0960 06B0960 01B0960 08, B0960 21
Right Rear Object Sensor SignalB0961 06B0961 06B0961 01B0961 08, B0961 21
Low ReferenceB0954 01, B0955 01, B0956 01, B0957 01, B0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The parking assist control module supplies 8 V to the object sensors via the object sensor supply voltage circuit and provides ground via the object sensor low reference circuit. The parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the parking assist control module uses the sensor echo received through the object sensor signal circuit to calculate the distance and position of an object.

  1. Ignition ON
  2. Transmission in REVERSE

B1405 02

The parking assist control module has detected the object sensor supply voltage circuit is shorted to ground.

B1405 03

The parking assist control module has detected the object sensor supply voltage circuit is less than 7.2 V.

B1405 07

The parking assist control module has detected the object sensor supply voltage circuit is greater than 9.2 V.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#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, transmission in R.
  2. Verify the scan tool Park Assist Sensor Reference Voltage parameter is between 7.2-9.2 V. If Park Assist Sensor Reference Voltage is not between 7.2-9.2 V Refer to Circuit/System Testing If Park Assist Sensor Reference Voltage is between 7.2-9.2V
  3. All OK.
  1. Ignition OFF, disconnect harness connectors X2 and X3 at the K41 Front and Rear Parking Assist Control Module, ignition ON.
  2. Test for less than 1 V between the 8 V reference circuit terminals listed below and ground. Terminal 4 X2 Terminal 1 X3 If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  3. Ignition OFF.
  4. Test for infinite resistance between 8V reference circuit terminals listed below and ground. Terminal 4 X2 Terminal 1 X3 If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  5. Replace the K41 Front and Rear Parking Assist Control Module.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Front Parking Assist Alarm Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Rear Parking Assist Alarm Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for parking assist control module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Switch SignalB356A 021
Switch Ground1
1. Lane departure cannot be enabled or disabled, forward collision alert timing sensitivity not adjustable.

The Vehicle Direction Warning Switch DTC detects a short to ground on the circuit that contains the lane departure warning and forward collision setting switches. The lane departure warning feature is enabled and disabled through the lane departure switch located in the left steering wheel controls switch. When enabled, the frontview camera module will illuminate the indicator located in the switch. The forward collision alert distance is adjustable using the forward collision switch located in the left steering wheel controls switch. The setting is shown in the driver information center.

Ignition ON

The frontview camera module has detected a short to ground for more than 10 s.

  1. Lane departure and forward collision warning features are disabled.
  2. Service Front Camera is displayed on the driver information center.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the scan tool Lane Departure Warning Switch Status parameter while pressing and releasing the lane departure warning switch. The parameter should change between Open and Closed. If the parameter does not change Refer to Circuit/System Testing. If the parameter changes
  3. Verify the driver information center displays and adjusts forward collision alert setting while repeatedly pressing and releasing the forward collision switch. The setting should change cycle between far, medium, near, and off. If the display does not change Refer to Circuit/System Testing. If the display changes
  4. All OK.
  1. Ignition OFF, remove the ignition key, open the driver door, disconnect the scan tool, all vehicle systems OFF, this may take up to 2 min. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for less than 10 ohms between the ground circuit terminal 7 and ground. If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open. If not Open Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the signal circuit terminal 2 at the S70L Steering Wheel Controls Switch - Left and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Open
  5. Reconnect the harness at S70L Steering Wheel Controls Switch - Left. Ignition ON.
  6. Verify the scan tool Lane Departure Warning Switch Status parameter while pressing and releasing the vehicle direction warning switch. The parameter should change between Open and Closed. If the parameter does not change Test or replace the S70L Steering Wheel Controls Switch - Left. If the parameter changes
  7. All OK.

Component Test

Static Test

  1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for infinite resistance between the control circuit terminal 2 and ground circuit terminal 7. If less than infinite resistance Replace the S70L Steering Wheel Controls Switch - Left. If infinite resistance
  3. Test for 1.0k - 1.5k ohms between the control circuit terminal 2 and ground circuit terminal 7 while pressing forward collision alert switch. If not between 1.0k - 1.5k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 1.0k - 1.5k ohms
  4. Test for 3.8k - 5.8k ohms between the control circuit terminal 2 and ground circuit terminal 7 while pressing lane departure warning switch. If not between 3.8k - 5.8k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 3.8k - 5.8k ohms
  5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Cruise Control Switch Replacement»(/cadillac/elr/i-2013-2015/remont/cruise-control-systems/#cruise-control-system) - Steering Wheel Controls Switch - Left replacement.
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Frontview Camera Modulereplacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The frontview camera module has determined that it is not properly mounted.

Vehicle operating on the road.

The frontview camera module was unable to see the road ahead.

  1. The frontview camera module is disabled.
  2. The Active Safety System is disabled.
  3. Service Driver Assist is displayed on the driver information center and/or heads up display.

The frontview camera module is successfully aligned.

  1. The frontview camera module needs to be securely mounted. Verify it is secured properly in it's mount.
  2. The frontview camera module needs to have a clear field of vision to the road ahead. Check for anything that can impair the camera's vision.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify there are no DTCs set, except for DTC B101E 4B in the B233B Radar Sensor Module - Long Rage or K109 Frontview Camera Module. If other DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If no other DTCs are set
  3. Perform the calibration procedure. Refer to «Front View Camera Module Calibration»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__front-view-camera-module-calibration) .
  4. Verify DTC B390D 66 is not set If DTC B390D 66 is set Replace and calibrate the K109 Frontview Camera Module. If DTC B390D 66 is not set
  5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for frontview camera module replacement, programming, and setup.

Symptoms - Object Detection

Note. The following steps must be completed before using the symptom tables

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the Symptom Tables in order to verify that all of the following are true: before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Object Detection Description and Operation (with Front and Rear Park Assist, UD5)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__object-detection-description-and-operation-with) , «Object Detection Description and Operation (with Lane Departure Warning, UFL)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__object-detection-description-and-operation-with) , «Object Detection Description and Operation (with Forward Collision Alert, UEU)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__object-detection-description-and-operation-with) , «Object Detection Description and Operation (with Rearview Camera, UVC)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «Object Detection Description and Operation (with Side Blind Zone Alert, UFT)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «Object Detection Description and Operation (with Rear Cross Traffic Alert, UFG)»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which may affect the operation of the system. Refer to «Checking Aftermarket Accessories»(/cadillac/elr/i-2013-2015/remont/body-electrical/#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 may cause the symptom.
  3. Make sure the parking assist sensors located on the vehicle front and rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

  1. «Forward Collision Alert System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Lane Departure Warning System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Parking Assist System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  4. «Rear Vision Camera System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  5. «Side Object System Malfunction»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Forward Collision Alert Switch SignalP0580, P0592P0592P0593
Forward Collision Alert Switch Reference VoltageP155AP0580

The forward collision alert system is controlled by the front view camera module mounted on the windshield. The system is designed to detect vehicles directly ahead, within a distance of approximately 60 meters (197 feet). The forward collision alert system operates at speeds above 40 km/h (25 mph). When the system detects a vehicle in the path ahead, the green vehicle ahead alert indicator in the driver information center and/or head up display is illuminated. Refer to owner's manual for exact location of the vehicle ahead indicator. When approaching another vehicle too rapidly, the collision alert symbol will flash and the radio will beep or the haptic seat will pulse (if equipped), depending on user configuration. The red collision alert display will stay continuously illuminated if the vehicle ahead remains much too close. These actions are requested by the front view camera module via serial data. The forward collision alert switch is part of the left steering wheel controls and is used to adjust the timing sensitivity of the front collision alert system.

Certain factors will affect the operation of the forward collision alert system. Forward collision alert is intended to detect vehicles. It is not intended to warn the driver of any objects that are not detected as a vehicle such as pedestrians, animals, signs, guard rails, bridges, construction barrels or other stationary or slow moving objects. In few cases the camera may inadvertently detect a vehicle that is not in the path ahead, or the system may occasionally provide unrealistic alerts. This could occur with a turning vehicle ahead, guard rails, traffic signs, or other stationary objects. This is normal operation, the vehicle does not need service. When the system is operating properly, the green vehicle ahead alert indicator will illuminate on the vehicle direction display when the system detects a vehicle in the path ahead. This indicates that all of the required operating conditions are met. The green vehicle ahead alert indicator will not appear when the system is having difficulty seeing other vehicles on the road. This can occur if the front view camera is blocked with mud, dirt, snow, ice, slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service.

Additionally, the Front View Camera Disable History can give useful hints about what affected the operation of the forward collision alert system. For the Front View Camera Disable History, refer to DTC B1011 .

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Refer to Diagnostic Aids before performing Circuit/System Verification.

  1. Ignition ON.
  2. Verify the scan tool Forward Collision Alert Function Status parameter is not Malfunction. If the parameter is Malfunction Refer to Circuit/System Testing - Front View Camera Module Malfunction. If parameter is not Malfunction
  3. Verify the forward collision alert indicators illuminate momentarily when turning ignition OFF and then ON. If the indicators do not illuminate Refer to Displays and Gauges. If the indicators illuminate
  4. Verify the driver information center forward collision alert distance indicator toggles between far, medium, near and off when repeatedly pressing the forward collision alert gap switch. If the setting does not change Refer to Circuit/System Testing - Forward Collision Alert Switch Malfunction. If the setting changes
  5. Verify the area of the K109 Frontview Camera Module is not contaminated. If contaminated Clean the windshield. If not contaminated
  6. All OK.

Note. Perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Front View Camera Module Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K109 Frontview Camera Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If the test lamp illuminates
  4. Replace the K109 Frontview Camera Module.

Forward Collision Alert Switch Malfunction

  1. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module, ignition ON.
  2. Test for less than 1 V between the signal circuit terminals listed below and ground: Terminal 4 Terminal 16 If 1 V or greater Repair the short to voltage on the signal circuit. If less than 1 V
  3. Ignition OFF.
  4. Test for infinite resistance between the signal circuit terminals listed below and ground: Terminal 4 Terminal 16 If less than infinite resistance Repair the short to ground on the signal circuit. If infinite resistance
  5. Test for 7.0k-10.5k ohms between signal circuit terminals 4 and signal circuit terminal 16. If greater than 10.5k ohms Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left. Test for less than 5 ohms between the circuit terminals listed below: S70L Steering Wheel Controls Switch - Left terminal 1 and K9 Body Control Module terminal 4. S70L Steering Wheel Controls Switch - Left terminal 2 and K9 Body Control Module terminal 16. If greater than 5 ohms, repair the open/high resistance in the circuit. If less than 5 ohms, test or replace the S70L Steering Wheel Controls Switch - Left. If less than 7.0k ohms Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left. Verify infinite resistance between signal circuit terminals 4 and signal circuit terminal 16 If less than infinite resistance, repair short in circuit. If infinite resistance, test or replace the S70L Steering Wheel Controls Switch - Left. If between 7.0k - 10.5k ohms
  6. Test for 2.1k-3.2k ohms between signal circuit terminals 4 and signal circuit terminal 16 while pressing forward collision alert switch. If not between 2.1k-3.2k ohms Test or replace the S70L Steering Wheel Controls Switch - Left. If between 2.1k-3.2k ohms
  7. Replace the K9 Body Control Module.

Forward Collision Alert Switch

  1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for 7.0k-10.5k ohms between the reference voltage terminal 1 and the signal circuit terminal 2. If not between 7.0k-10.5k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 7.0k-10.5k ohms
  3. Test for 2.1k-3.1k ohms between the reference voltage terminal 1 and the signal circuit terminal 2 while pressing the switch. If not between 2.1k-3.1k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 2.1k-3.1k ohms
  4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Cruise Control Switch Replacement»(/cadillac/elr/i-2013-2015/remont/cruise-control-systems/#cruise-control-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front view camera module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Parking Assist Switch Indicator IgnitionB0968 06, 2B0968 06, 2
Parking Assist Switch SignalB0967 02, 11
Parking Assist Switch Indicator ControlB0968 06, 2B0968 06,2B0968 01, B0968 0B
Parking Assist Switch Ground1
1. Parking Assist Switch Malfunction 2. Parking Assist Indicator Malfunction

The parking assist system is enabled and disabled through the parking assist switch. When enabled, the parking assist indicator will illuminate.

The park assist switch and indicator are connected to the Parking Assist Control Module. The Parking Assist Control Module supplies a reference voltage to the parking assist switch. When the switch is pressed, the signal circuit is grounded. The Parking Assist Control Module can control the Park Assist Indicator by grounding the control circuit to illuminate the LED which indicates that the system is enabled.

The Parking Assist Control Module supplies an 8V reference voltage and a low reference to the object sensors. The sensors will return a signal based on the reflections from objects within range of the sensors.

When an object is detected, the Parking Assist Control Module will send serial data to the radio to provide an audible alert.

The scan tool Park Assist Disable History parameters are a list of the seven previous reasons the parking assist system was disabled. These parameters may help in the diagnosis of an intermittent concern or a customer concern which is the result of normal system operation. The following is a brief description of potential causes which may aid in diagnosis

  1. Manual Disable - The parking assist system has been disabled through the parking assist switch or audio system personalization menu.
  2. Hitch/Object Attached - The parking assist control module is detecting an object that is attached to the vehicle. Common items such as a hitch receiver, trailer, or a bicycle rack may cause this concern. Additionally, damage to the rear of the vehicle or a misaligned sensor may cause this concern. If the vehicle is damaged in a manner that causes the sensor to detect the bumper itself, the parking assist control module will interpret this as an attached object and disable the system. Carefully inspect the bumper, bumper mounting surface, and sensor retainers before continuing with normal diagnosis. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 mph).
  3. Reverse Overspeed - The vehicle is travelling too fast in reverse at speeds of greater than 8 km/h (5 mph).
  4. Inhibit - The parking assist control module has lost or received invalid GMLAN signal(s).
  5. Sensor Disturbance - An outside interference is causing sensor movement. Such interference may be caused a heavy pounding, like that of a nearby jackhammer, or large changes in pressure, such as a large truck air brakes.
  6. Sensor Ring Time - If the sensor fails its own diagnostic initialization the parking assist control module will set this error. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 mph). The following is a list of reasons this cause may have set: One or more of the sensors may be blocked by snow, mud, ice, or other debris. This might happen after going through a car wash in cold weather. Silicone insulator surrounding sensor maybe missing, cut, or twisted. Improperly installed sensor, sensor maybe be crooked due to a tight wire harness. One or more of the sensors may be scratched or the paint maybe chipped. Excessive paint thickness on a sensor may cause an excessive sensor ring time. When replacing or refinishing a sensor, do not apply an excessive amount of paint or clear coat.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition ON.
  2. Verify the scan tool Park Assist Switch parameter while pressing and releasing the parking assist switch. The parameter should change between Active and Inactive. If the parameter does not change between Active and Inactive Refer to Circuit/System Testing - Parking Assist Switch Circuit Malfunction. If the parameter changes between Active and Inactive
  3. Command the Park Assist Switch LED output control On and Off with the scan tool. The parking assist switch indicator should turn On and Off when changing between the commanded states. If the indicator does not turn ON and OFF Refer to Circuit/System Testing - Parking Assist Switch Indicator Circuit Malfunction. If the indicator does turn ON and OFF
  4. Transmission in R, verify the Calculated Transmission Range is Reverse. If the parameter is not Reverse Refer to «Backup Lamps Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the parameter is Reverse
  5. Transmission in R, verify the scan tool Park Assist System Status parameter displays Enable. If the parameter is not Enabled Refer to Diagnostic Aids to determine the cause. If the parameter is Enabled
  6. All OK.

Parking Assist Switch Circuit Malfunction

  1. Ignition OFF, disconnect the X1 harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Parking Assist Switch Status parameter is Inactive. If not Inactive Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the K41 Front and Rear Parking Assist Control Module control circuit terminal 8 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41 Front and Rear Parking Assist Control Module. If Inactive
  5. Install a 3 A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 5.
  6. Verify the scan tool Parking Assist Switch Status parameter is Active. If not Active Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If Active
  7. Replace S48D Multifunction Switch 2 - Instrument Panel.

Parking Assist Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the X1 harness connector at the S48D Multifunction Switch 2 - Instrument Panel, Ignition ON.
  2. Verify a test lamp illuminates between the PWM control circuit terminal 3 and ground. NOTE: Verify interior dimming is turned all the way bright. If the test lamp does not illuminate Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms , refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the test lamp illuminates
  3. Connect a test lamp between the control circuit terminal 2 and the PWM control circuit terminal 3.
  4. Verify the lamp turns ON and OFF when commanding the Park Assist Switch Indicator ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If the test lamp is always ON Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K41 Front and Rear Parking Assist Control Module. If the test lamp turns ON and OFF
  5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Instrument Panel Multifunction Switch Replacement»(/cadillac/elr/i-2013-2015/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
B+11
Signal +B010E 1BB010E 041
SignalB010E 1BB010E 041
Ground1
1. Pedestrian Alert System Inoperative

Due to the lack of audible engine noise, hybrid and electric vehicles are very quiet at low speeds. The pedestrian alert system emits an audible sound at speeds less than 34 km/h (21 MPH) to alert pedestrians that the vehicle is approaching. The sound will fade in and out and vary in pitch depending on vehicle speed. The K132 Pedestrian Alert Sound Control Module is supplied with B+ and ground. It communicates using serial data. The module outputs a signal to the P48 Pedestrian Alert Sound Speaker.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the Pedestrian Alert Sound System parameter is Active. If Pedestrian Alert Sound System is Malfunction Refer to Circuit/System Testing - Pedestrian Alert Sound System Malfunction If Pedestrian Alert Sound System is Disabled Enable system using the driver information center. If Pedestrian Alert Sound System is Active
  3. Verify the P48 Pedestrian Alert Sound Speaker turns on and off when commanding the Pedestrian Alert Sound When Driving Forward parameter On and Off with a scan tool. If the speaker does not turn ON and OFF Refer to Circuit/System Testing - Output Speaker Malfunction. If the speaker turns ON and OFF
  4. All OK.

Pedestrian Alert Sound System Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K132 Pedestrian Alert Sound Control Module. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 3 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Verify a test lamp illuminates between the B+ circuit terminal 10 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K132 Pedestrian Alert Sound Control Module. If the test lamp illuminates
  4. Ignition ON.
  5. Verify a test lamp illuminates between the ignition circuit terminal 4 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K132 Pedestrian Alert Sound Control Module. If the test lamp illuminates
  6. Replace the K132 Pedestrian Alert Sound Control Module.

Output Speaker Malfunction

  1. Ignition OFF, disconnect the harness connector at the P48 Pedestrian Alert Sound Speaker. Ignition ON,.
  2. Command Pedestrian Alert Sound When Driving Forward parameter On with a scan tool.
  3. Test for 5-7 V between each audio signal circuit terminal 1 and terminal 2 and ground. If less than 5 V Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K132 Pedestrian Alert Sound Control Module. If greater than 7 V Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module. Ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K132 Pedestrian Alert Sound Control Module. If between 5-7 V
  4. Test for 49-51 Hz AC between each signal circuit terminal 1 and terminal 2 and ground. If not between 49-51 Hz AC Replace the K132 Pedestrian Alert Sound Control Module. If between 49-51 Hz AC
  5. Test or replace the P48 Pedestrian Alert Sound Speaker.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Pedestrian Sound Alert Speaker Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Pedestrian Sound Alert Module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Ignition1B127B 2B
Backup Signal1B127B 2B2
Camera Module signal +111
Camera Module signal3B127B 2B1
GroundB127B 2B
Shield3B127B 2B3
1. Rear Vision Camera Malfunction 2. Rear Vision Camera image always displayed 3. Poor Quality Image

When the transmission is placed into REVERSE, a 12 V signal is sent to the B87 Rearview Camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the rearview camera. The rearview camera sends video information to the K74 Human Interface Control Module through a video signal + and a video signal - circuit. A grounded shielding also wraps the video signal circuits to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.

A poor video image can be caused by ice, snow, and mud buildup on the lens of the rearview camera. Also, extreme lighting conditions can affect performance, such as operating in the dark or with bright sunlight shining on the camera. Extreme high or low temperatures can also affect the image quality. An open in the shield of the video signal circuit can also cause a distorted screen.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B2545 is not set. If the DTC is set Refer to «DTC B2545»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the DTC is not set
  3. Verify the rearview camera has no debris on the lens and that the bezel and bezel seal are not damaged. If debris is found on the lens Clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary. If no debris on the lens
  4. Ignition ON, transmission in R.
  5. Verify the backup lamps are illuminated. If the backup lamps are not illuminated Refer to «Backup Lamps Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the backup lamps are illuminated
  6. Engine running, transmission in R.
  7. Verify a clear rear vision image is displayed on the P17 Info Display Module. If a clear image is not displayed Refer to Circuit/System Testing. If a clear image is displayed
  8. All OK.

Note. Circuit/System Verification must be performed before Circuit/System Testing. Under normal operating conditions the Human Interface Machine Control Module will become very hot. The module should be allowed to cool down prior to removal for any service procedure.

  1. Ignition OFF, disconnect the harness connector at the B87 Rearview Camera.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse. Refer to «Power Mode Mismatch»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B87 Rearview Camera. If the test lamp illuminates
  5. Engine running, park brake applied, transmission in R.
  6. Test for greater than 11 V between the control circuit terminal 3 and ground. If less than 11 V Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If greater than 11 V
  7. Ignition OFF, disconnect the X2 harness connector at the K74 Human Interface Control Module, ignition ON.
  8. Test for less than 1 V between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1 B87 Rearview Camera signal (-) circuit terminal 4 If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  9. Test for infinite resistance between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1 B87 Rearview Camera signal (-) circuit terminal 4 If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  10. Test for less than 2 ohms in the signal (+) circuit end to end. If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
  11. Test for less than 2 ohms in the signal (-) circuit end to end. If 2 ohms or greater Test the signal circuit for an open/high resistance. If less than 2 ohms
  12. Replace the B87 Rearview Camera.
  13. Engine running, transmission in R, verify a clear rear vision image is displayed on the P17 Info Display Module. If a clear rear vision image is not displayed Replace the K74 Human Interface Control Module. If a clear rear vision image is displayed
  14. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Rearview Driver Information Camera Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Body Control Module, and Human Interface Control Module replacement, programming and setup
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Side Object Sensor - Left GroundU02321
Side Object Sensor - Left B+1U0232
Side Object Sensor - Left, Data Communication (terminal 1)1U02321
Side Object Sensor - Left, Data Communication (terminal 4)U18A6U18A6U18A6
Side Object Sensor - Left, Data Communication (terminal 5)U18A6U18A6
Side Object Sensor - Left, Control (terminal 3)U18A6U18A6
Side Object Sensor - Right GroundU18A6U18A6
Side Object Sensor - Right B+U18A6U18A6
Side Object Sensor - Right, Left Indicator Control CircuitB094C 39, 312
Side Object Sensor - Right, Right Indicator Control CircuitB094C 39, 312
1. Side blind zone alert malfunction 2. Side blind zone alert Indicator on all the time 3. Opposite side blind zone alert indicator flashes rapidly

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool can communicate only with the left sensor.

Side blind zone alert is active when the vehicle is out of park or the parking brake is off on manual transmission vehicles. If a vehicle is detected in the side blind zone, the warning symbols will turn illuminate on the appropriate side. The warning symbols will vary brightness based on the ambient light conditions.

When an object is detected in the left side blind zone, the side object sensor module sends a message to the right sensor through serial data. The right sensor then supplies voltage to illuminate the visual indicator on the left side outside rear view mirror. When an object is detected in the right side blind zone, the right side object sensor will supply a voltage to illuminate the visual indicator on the right side outside rear view mirror. Each sensor is supplied B+ and ground. Ground is provided through the outside rearview mirror harness.

  1. When the ignition is turned on, or the engine is started, both outside rearview mirror displays will briefly come on to indicate that the system is operating.
  2. The conditions for disabling the side blind zone alert system are captured by DTCs. The drivers information center will display Service Side Detection System if one of the sensors has failed.
  3. The side blind zone system will be disabled if the driver has selected the Off mode through vehicle personalization menus. The selected mode is retained over ignition cycles. A driver information center message stating that the side blind zone system is off shall be displayed and the outside mirror indicators will be OFF.
  4. The side blind zone may be temporarily unavailable if a blockage condition exists (i.e. mud/snow buildup in front of the sensor). A driver information message "Side Detection System Unavailable" will be displayed. The side blind zone system transitions back to the normal operating state when the blockage is removed. Bumper sticks, fascia damage, labels, and heavy rain storms may also cause this condition. The blockage determination is performed with the vehicle in a drive gear.
  5. Because the sensors are NOT identical, they must NOT be swapped from one side of the vehicle to the other in an attempt to isolate a concern. Sensors should also NOT be swapped from one vehicle to another.
  6. The side blind zone system is designed to ignore stationary objects; however, the system may occasionally detect guard rails, signs, trees, shrubs, or other stationary objects as an object in the blind zone. This is normal system operation and does not require service.
  7. The side blind zone system may indicate an object in the blind zone if a trailer is attached to the vehicle, or a bicycle or object is extending out to either side of the vehicle. This is normal operation and does not require service.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the scan tool can communicate with the left side object sensor. If the scan tool can not communicate with the left side object sensor Refer to Circuit/System Testing - Left Side Object Sensor Malfunction. If the scan tool can communicate with the left side object sensor
  3. Verify DTC U18A6 is not present If DTC U18A6 is present Diagnose this DTC first. Refer to Diagnostic Trouble Code List. If DTC U18A6 is not present
  4. Ignition OFF, ignition ON.
  5. Verify that both side blind zone alert system indicators located in the outside rearview mirrors briefly turn ON and then turn OFF during the system self test. If both side blind zone alert indicators do not briefly turn ON and OFF Verify the system is enabled If disabled, refer to diagnostic aids for cause of disable. If enabled, refer to Circuit/System Testing - Side Object Indicator Malfunction. If only one indicator does not briefly illuminate during the self test Refer to Circuit/System Testing - Side Object Indicator Malfunction. If both side blind zone alert indicators briefly turn ON and OFF
  6. All OK.

Left Side Object Sensor Malfunction

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connector at the B218L Side Object Sensor Module - Left. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between ground circuit terminal 7 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Verify a test lamp illuminates between the B+ circuit terminal 8 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition Off. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B218L Side Object Sensor Module - Left. If the test lamp illuminates
  4. Ignition OFF and all vehicle systems OFF. Disconnect the It may take up to 2 minutes for all vehicle systems to power down.
  5. Test for less than 2 ohms between the serial data circuit terminal 1 and the DLC terminal 1. If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
  6. Replace B218L Side Object Sensor Module - Left.

Side Object Indicator Malfunction

  1. Ignition OFF and all vehicle systems OFF, remove the appropriate outside rearview mirror glass and disconnect the P43 Side Object Detection Indicator connector. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON, connect a test lamp between the control circuit terminal and the ground circuit terminal.
  4. Verify the test lamp turns ON and OFF when commanding the Object Detection Alert Indicators ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the B218R Side Object Sensor Module - Right. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the B218R Side Object Sensor Module - Right. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the B218R Side Object Sensor Module - Right, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the B218R Side Object Sensor Module - Right. If the test lamp turns ON and OFF
  5. Test or replace the appropriate A9 Outside Rearview Mirror Glass.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Outside Rearview Mirror Glass Replacement»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for side object sensor module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/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»(/cadillac/elr/i-2013-2015/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
Lane Departure Warning Switch SignalB356A 021B356A 05
Lane Departure Warning Switch Ground1
Lane Departure Warning Switch Indicator Ignition22
Lane Departure Warning Switch Indicator Control2B0987 06, B0987 0BB0987 01, B0987 0B
1. Lane departure warning switch malfunction. 2. Lane departure warning switch indicator malfunction.

The lane departure warning system is enabled and disabled through the lane departure switch. When enabled, the lane departure warning indicator will illuminate.

The lane departure switch and indicator are connected to the frontview camera module. The frontview camera module supplies a reference voltage to the lane departure switch. When the switch is pressed, the signal circuit is grounded. When enabled, the frontview camera module will illuminate the indicator located in the switch when lane departure warning system is enabled.

When the system is operating and can detect the lane markings, the frontview camera module will request via serial data communications that the instrument cluster illuminate the green lane departure warning symbol. If the frontview camera module detects that the vehicle unintentionally crosses a lane marking without the turn signal being used, the module will request the instrument cluster to flash the amber lane departure warning indicator. An audible warning will also sound three times when the amber lane departure warning indicator in the instrument cluster is flashing.

Certain factors will affect the operation of the lane departure warning system. When the system is operating properly, the indicator will illuminate on the instrument cluster. This indicates that all of the required operating conditions to permit lane departure warning have been met. The indicator will not appear when the system is having difficulty seeing the lines on the road or if the view of the frontview camera is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service. Additionally, lane departure warnings may occasionally occur in a properly operating vehicle due to tar marks, shadows, cracks in the road, or other road imperfections. This is normal system operation and the vehicle does not require service. The driver information center may also display Lane Departure System Unavailable due to the temporary conditions listed above.

Additionally, the Frontview Camera Disable History can give useful hints about what affected the operation of the lane departure warning system. For the Frontview Camera Disable History, refer to DTC B1011 .

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B356A is not set. If the DTC is set Refer to «DTC B356A»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If the DTC is not set
  3. Verify that DTC B0987 is not set. If the DTC is set Refer to «DTC B0987»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If the DTC is not set
  4. Verify the scan tool Frontview Camera System Status parameter is Normal. If the parameter is Undefined or Malfunction Refer to Diagnostic Aids. If the parameter is Normal
  5. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Active and Inactive when pressing the lane departure warning switch. If the parameter does not change between Active and Inactive Refer to Circuit/System Testing - Lane Departure Warning Switch Malfunction. If the parameter changes between Active and Inactive
  6. Verify the scan tool Lane Departure Warning Indicator turns ON and OFF when commanding the Lane Departure Warning Indicator On and Off with a scan tool. If the indicator does not turn on and off Refer to Circuit/System Testing - Lane Departure Warning Switch Indicator Malfunction. If the indicator turns on and off
  7. All OK.

Lane Departure Warning Switch Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch 1 - Instrument Panel. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the ground circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the S48C Multifunction Switch 1 - Instrument Panel signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Inactive
  5. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
  6. Verify the scan tool Lane Departure Warning Switch parameter is Active. If not Active Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If Active
  7. Test or replace the S48C Multifunction Switch 1 - Instrument Panel.

Lane Departure Warning Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch 1 - Instrument Panel, ignition ON.
  2. Test for 6.2-10.9 V between the dimming control circuit terminal 3 and ground terminal 5. If less than 6.2 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground in the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If greater than 10.9 V Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, refer to «Interior Backlighting Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If between 6.2-10.9 V
  3. Connect a test lamp between the control circuit terminal 2 and B+.
  4. Verify the test lamp turns ON and OFF when commanding the Lane Departure Warning Indicator ON and OFF with a scan tool. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the S48C Multifunction Switch 1 - Instrument Panel. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If the test lamp turns ON and OFF
  5. Test or replace the S48C Multifunction Switch 1 - Instrument Panel.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Hazard Warning Switch Replacement»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) - S48C Multifunction Switch 1 - Instrument Panel replacement.
  2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for frontview camera module replacement, programming and setup.

Scheme 8

Scheme 8: Front Seat Lane Departure Warning Actuator Replacement
Scheme 8: Front Seat Lane Departure Warning Actuator Replacement
CalloutComponent Name
WARNING: Refer to SIR Warning . Preliminary Procedure Remove the driver or passenger seat. Refer to Driver or Passenger Seat Removal and Installation . Remove the front seat cushion cover and pad. Refer to Front Seat Cushion Cover and Pad Replacement .
1Front Seat Lane Departure Warning Actuator Topper Pad (Qty: 2) Procedure Gently peel away the topper pad from the seat cushion pad. When removing the topper pad be careful not to damage the motor. NOTE: The topper pad must be replaced every time the motor is replaced.
2Front Seat Lane Departure Warning Actuator Motor (Qty: 2) Procedure Reposition the heater element as needed to gain access to the actuator wire. Cut the original actuator wire that connects to the main harness and splice in the new actuator wire. Refer to Splicing Copper Wire Using Splice Sleeves Remove the original actuator and discard it. Note the routing of the original wire and harness location for installation. NOTE: Adjust the splice location so that each splice is at least 40 mm (1.5 in) away from other splices, harness branches, or connectors.
WARNING
Refer to SIR Warning .
NOTE
The topper pad must be replaced every time the motor is replaced.
NOTE
Adjust the splice location so that each splice is at least 40 mm (1.5 in) away from other splices, harness branches, or connectors.

Front Seat Lane Departure Warning Actuator Replacement

Removal Procedure

  1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/elr/i-2013-2015/remont/body-electrical/#battery-charging-system-and-starting-system) .
  2. Remove the front bumper fascia. Refer to «Front Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias) .
  3. Disconnect the forward range radar module wiring harness plug (2) from the forward range radar module (1).
  4. Carefully lift the forward range radar module away from the bracket by using a plastic tool at the positions (1, 2) and (3) successively as shown in the graphic.
  5. Carefully remove the forward range radar module (2) from the forward range radar module bracket (1).

Installation Procedure

  1. If the forward range radar bracket is deformed, replace the bracket. Refer to «Forward Range Radar Bracket Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .
  2. Carefully press the forward range radar module (3) to the forward range radar module bracket (1) and check for proper seat.
  3. Connect the forward range radar module wiring harness plug (2).
  4. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/elr/i-2013-2015/remont/body-electrical/#battery-charging-system-and-starting-system) .
  5. Execute the vertical alignment of the forward range radar module. Refer to «Forward Range Radar Module Alignment»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__forward-range-radar-module-alignment) .
  6. Install the front bumper fascia. Refer to «Front Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias) .
  7. For programming and set up, refer to «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

Forward Range Radar Module Alignment

  1. Inspect the forward range radar module for damage. Refer to «Forward Range Radar Module Inspection»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__forward-range-radar-module-inspection) .
  2. The alignment of the forward range radar module is performed under the following vehicle conditions: With an empty vehicle: There shall not be any person in the vehicle Specific equipment can remain in the vehicle Luggage must not exceed 5 kg (11 lb) The vehicle must stand on a flat surface. The level of the ground must not vary by more than +/-7mm/m. This corresponds to 0.4 degrees, using a water bubble level. (1) as shown in graphic. Vehicle tires must have specified air pressure.
  3. Use a water bubble level (2) to align the forward range radar module vertically as shown in the graphic.
  4. Turn the screw (1) until the water bubble level has a value of 90 degrees.

Forward Range Radar Module Inspection

  1. CONTROL MODULE DTC CHECK - Using a scan tool, perform the Vehicle DTC Information function-Verify there are no current control module DTCs set. If any DTC is set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Inspect the forward range radar module (4) for vertical alignment. Refer to «Forward Range Radar Module Alignment»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__forward-range-radar-module-alignment) .
  3. Check the 3 ball sockets (5) for fixed seating. If the ball sockets are damaged replace the ball sockets.
  4. Inspect all studs (1) for proper seat. If damaged, replace the bracket. Refer to «Forward Range Radar Bracket Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .
  5. Inspect the forward range radar module bracket (2) for paint cracks and deformations. Do NOT repair any cracks or misalignments. If damaged, replace the bracket. Refer to «Forward Range Radar Bracket Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .
  6. Inspect the wiring harness plug (3) and the terminal of the forward range radar module for any damage.

Scheme 9

Scheme 9: Forward Range Radar Bracket Replacement
Scheme 9: Forward Range Radar Bracket Replacement
CalloutComponent Name
CAUTION: Always use care when handling the forward range radar module and bracket. Improper handling can cause damage to the module or bracket and affect the functionality of the system. Preliminary Procedures Remove the forward range radar module. Refer to Forward Range Radar Module Replacement . Replace the 3 ball sockets from the forward range radar module. Inspect the forward range radar module. Refer to Forward Range Radar Module Inspection .
1Forward Range Radar Bracket Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 9 (80 lb in)
2Forward Range Radar Bracket
CAUTION
Always use care when handling the forward range radar module and bracket. Improper handling can cause damage to the module or bracket and affect the functionality of the system.
CAUTION
Refer to Fastener Caution .

Forward Range Radar Bracket Replacement

Scheme 10

Scheme 10: Forward Collision Alert Display Replacement
Scheme 10: Forward Collision Alert Display Replacement
CalloutComponent Name
Preliminary Procedure Remove the instrument panel extension. Refer to Instrument Panel Extension Replacement .
1Forward Collision Alert Display Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 2.5 N.m (22 lb in)
2Forward Collision Alert Display Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Forward Collision Alert Display Replacement

Scheme 11

Scheme 11: Pedestrian Sound Alert Module Replacement
Scheme 11: Pedestrian Sound Alert Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the rear compartment floor stowage trim compartment. Refer to Rear Compartment Floor Stowage Trim Compartment Replacement . Remove the rear compartment side trim panel - right side. Refer to Rear Compartment Side Trim Replacement - Right Side .
1Pedestrian Sound Alert Module Fastener CAUTION: Refer to Fastener Caution .
2Pedestrian Sound Alert Module Bracket
3Pedestrian Sound Alert Module Procedure Disconnect the electrical connectors. For programming and set up information, refer to Control Module References .
CAUTION
Refer to Fastener Caution .

Pedestrian Sound Alert Module Replacement

Scheme 12

Scheme 12: Pedestrian Sound Alert Speaker Replacement
Scheme 12: Pedestrian Sound Alert Speaker Replacement
CalloutComponent Name
Preliminary Procedure Remove the front bumper fascica. Refer to Front Bumper Fascia Removal and Installation .
1Pedestrian Sound Alert Speaker Fastener CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2Pedestrian Sound Alert Speaker Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Pedestrian Sound Alert Speaker Replacement

Scheme 13

Scheme 13: Rear Object Alarm Control Module Replacement
Scheme 13: Rear Object Alarm Control Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the rear compartment side trim - left side. Refer to Rear Compartment Side Trim Replacement - Left Side .
1Rear Object Alarm Control Module Fastener (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 5 N.m (44 lb in)
2Rear Object Alarm Control Module Procedure Disconnect the electrical connectors. For programming and set up, refer to Control Module References .
CAUTION
Refer to Fastener Caution .

Rear Object Alarm Control Module Replacement

  1. Remove front bumper fascia. Refer to «Front Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias) .
  2. Disconnect electrical from the front object alarm sensor.
  3. Lift the locking tabs on the housing and remove the front object alarm sensor.
  1. Paint the front object alarm sensor. Refer to «Basecoat/Clearcoat Paint Systems»(/cadillac/elr/i-2013-2015/remont/paintcoatings/#paint-and-coatings__basecoatclearcoat-paint-systems) .
  2. Ensure the paint does not exceed 6 mils. Use a paint thickness gauge suitable for non-ferrous metals. Refer to «Paint Gauges»(/cadillac/elr/i-2013-2015/remont/paintcoatings/#paint-and-coatings__paint-gauges) .
  3. Insert the sensor into the housing.
  4. Connect the electrical connector to the front object alarm sensor.
  5. Install the front bumper fascia. Refer to «Front Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias) .

Scheme 14

Scheme 14: Side Object Sensing Alert Module Replacement
Scheme 14: Side Object Sensing Alert Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the rear bumper fascia. Refer to Rear Bumper Fascia Removal and Installation .
1Side Object Sensing Alert Module Fasteners (Qty: 3) CAUTION: Refer to Fastener Caution .
2Side Object Sensing Alert Module Procedure Disconnect the electrical connector. For programming and set up, refer to Control Module References .
CAUTION
Refer to Fastener Caution .

Side Object Sensing Alert Module Replacement

  1. Remove rear bumper fascia. Refer to . «Rear Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias)
  2. Disconnect electrical from the rear object sensor.
  3. Lift the locking tabs on the housing and remove the rear object sensor.
  1. Paint the rear object sensor. Refer to «Basecoat/Clearcoat Paint Systems»(/cadillac/elr/i-2013-2015/remont/paintcoatings/#paint-and-coatings__basecoatclearcoat-paint-systems) .
  2. Ensure the paint does not exceed 6 mils. Use a paint thickness gauge suitable for non-ferrous metals. Refer to «Paint Gauges»(/cadillac/elr/i-2013-2015/remont/paintcoatings/#paint-and-coatings__paint-gauges) .
  3. Insert the sensor into the housing.
  4. Connect the electrical connector to the rear object sensor.
  5. Install the rear bumper fascia. Refer to «Rear Bumper Fascia Removal and Installation»(/cadillac/elr/i-2013-2015/remont/exterior-body-panels/#bumpers-and-fascias) .

Scheme 15

Scheme 15: Front View Camera Replacement
Scheme 15: Front View Camera Replacement
CalloutComponent Name
Preliminary Procedure Remove the inside rearview mirror wiring harness lower cover. Refer to Inside Rearview Mirror Wiring Harness Lower Cover Replacement .
1Front View Camera Procedure Gently depress top center tab on bracket to release camera. Disconnect the electrical connector. Program and calibrate the front view camera. For programming and set up, refer to Front View Camera Module Calibration .

Front View Camera Replacement

Scheme 16

Scheme 16: Rearview Driver Information Camera Replacement
Scheme 16: Rearview Driver Information Camera Replacement
CalloutComponent Name
Preliminary Procedure Remove the rear closure center with license plate applique. Refer to Rear Closure Center with License Plate Applique Replacement .
1Rearview Driver Information Camera Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 2.5 (22 lb in)
2Rearview Driver Information Camera Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Rearview Driver Information Camera Replacement

Front View Camera Module Calibration

The calibration procedure will start automatically after SPS programming is complete. During this time the Lane Departure Warning amber indicator will illuminate.

Calibration

The calibration process for the front view camera system is necessary when a front view camera module is replaced by a new one. This process shall not be required when only replacing the windshield and the front view camera module has been mounted again properly. This process shall be completed within 3-5 minutes when the correct driving conditions are met. If conditions are not met correct, the front view camera module shall continuously run the service point calibration until successfully completed. This process shall work across ignition cycles and shall not be required to be re-initialized at start up. If the Lane Departure Warning Switch is pressed during calibration, the indictor will flash momentarily and then stay out - this is normal operation.

To calibrate the front camera, operate the vehicle in the following conditions until the calibration is complete

  1. Clean windshield.
  2. Avoid lane changes.
  3. Maintain vehicle speeds between 56-90 km/h (35-56 MPH).
  4. Ensure the road contains visible references (well defined lane markings, curbs, etc.).

Once the procedure is complete, the amber indicator will turn off. Shortly after the green ready to assist light should turn on as long as all conditions are met for normal operation. The system is then ready to assist.

If Slow to Calibrate

One or more of the following conditions may increase the length of time required to complete the self-calibration procedure

  1. Heavy traffic
  2. Stop and go traffic
  3. Mountain roads
  4. Curves in roadway
  5. Poor contrast lane markings
  6. Botts' Dots type lane markings
  7. Operating the vehicle speed is greater than 90 km/h (56 MPH)
  8. Driving through snow or fog, or driving directly into the sun
  9. Camera not properly installed. Verify it is snapped into tabs and is secure. Refer to «Front View Camera Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

No Calibration

Conditions that will prevent completion of the self-calibration procedure

  1. Dirty windshield glass or obstruction on windshield
  2. Operating the vehicle with speed less than 56 km/h (35 MPH)
  3. No visible lane markings
  4. Severe weather where lane markings cannot be seen
  5. Camera not properly installed. Verify it is snapped into tabs and is secure. Refer to «Front View Camera Replacement»(/cadillac/elr/i-2013-2015/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

Object Detection Description and Operation (with Front and Rear Park Assist, UD5)

The parking assist system is designed to identify and notify the driver of an object in the vehicle path when moving forward or reversing at speeds of less than 8 km/h (5 MPH). The distance and location of the object is determined by 8 object sensors: 4 located in the rear bumper and 4 located in the front bumper. The parking assist system will notify the driver using an audible beep signal through the radio.

The parking assist system is made up of the following components

  1. Advanced parking assist control module
  2. Front object alarm sensors
  3. Rear object alarm sensors
  4. Parking assist switch
  5. Parking assist switch indicator

Advanced Parking Assist Control Module

The advanced parking assist control module provides a reference voltage and a low reference to the 8 object alarm sensors. The advanced parking assist control module receives individual signals from each of the 8 sensors and determines the location and distance of an object based on these inputs. When an object is detected, the advanced parking assist control module will send a data message via CAN-Bus to the radio requesting an audible alert.

Object Alarm Sensors

The object alarm sensors are located in the front and rear bumpers of the vehicle. The sensors are used to determine the distance between an object and the bumper. Each sensor emits an ultrasonic frequency which is reflected off any object located in front of or behind the vehicle. These reflections are received by the sensors. The time difference between the emission of the frequency and when the reflection is received is known as sensor echo time, it is used to determine the distance to the object. The sensors report this information to the advanced parking assist control module.

Parking Assist Switch

The parking assist can be activated and deactivated by pressing the parking assist switch. By engaging the reverse gear the parking assist can also be activated. By subsequently pressing the parking assist switch the parking assist can be disabled again.

Parking Assist Switch Indicator

The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, the parking assist is activated.

Parking Assist Operation

When an object is within the measuring range of the sensor, the ultrasonic pulse is reflected and is received by the sending or a neighboring sensor. The sensor converts this signal into a voltage signal and sends this signal to the parking assist control module. The advanced parking assist control module evaluates the received sensor signals. As soon as an object is within the measuring range, the advanced parking assist control module sends a message via CAN-Bus to the radio in order to give out the acoustic distance signal.

The parking assist system can detect objects greater than 7.6 cm (3 in) wide and 25.4 cm (10 in) tall. The system cannot detect objects below the bumper, underneath the vehicle. If an object is detected, one of the following will occur

  1. The measuring range of the front object alarm sensors is between 30-120 cm (11.8-47.2 in). From a distance of 120 cm (47.2 in), the acoustic signal is active. The frequency of the beep sound increases with decreasing distance. From a distance less than 30 cm (11.8 in), the sound becomes continuous.
  2. The measuring range of the rear object alarm sensors is between 30-250 cm (11.8-98.4 in). From a distance of 250 cm (98.4 in), the acoustic signal is active. The frequency of the beep sound increases with decreasing distance. From a distance less than 30 cm (11.8 in), the sound becomes continuous.

The parking assist can be activated and deactivated by pressing the parking assist switch. When REVERSE gear is selected, park assist automatically is engaged for both front and rear sensors. When the vehicle is put into DRIVE from REVERSE the front assist sensors will be active up to speeds of 8 km/h (5 MPH) to assist with parking maneuvers. Once the vehicle is above 8 km/h (5 MPH) the front sensors are disabled and will not be re-enabled until either REVERSE gear is selected or the parking assist switch is pressed to activate the system. Once the parking assist switch is pressed during a key cycle the front sensors become active at speeds under 8 km/h (5 MPH). If the park assist switch is pressed again in the same key cycle the message "Park Assist Off" will be displayed in the driver information center if the vehicle speed is under 8 km/h (5 MPH) and front sensors detect an object within 120 cm (47.2 in). The LED indicator on the parking assist switch provides the ON/OFF state of the system. If the indicator is ON, the system is active and ready to assist.

The advanced parking assist control module carries out a self test and monitors the sensors for electrical and mechanical faults. Monitored is the power supply of each sensor and the sensor signals, which need to alter when the vehicle moves. If this is not the case, the sensor is acoustically blocked or faulty. Mud, ice and snow may cause obstruction of the function of the sensors. Besides that the advanced parking assist control module checks whether the correct type of sensor is installed. If any of these tests fails, a DTC with corresponding symptom is set, the parking assist is deactivated and the parking assist indicator in the instrument panel cluster is activated.

Parking Assist System Driver Information Center Messages

SERVICE PARK ASSIST

The driver information center displays SERVICE PARK ASSIST when the advanced parking assist control module detects a malfunction in the parking assist system and the system is disabled. The driver information center also displays SERVICE PARK ASSIST when a loss of communication occurs with the advanced parking assist control module.

PARK ASSIST OFF

The PARK ASSIST OFF message is displayed in the driver information center when the parking assist system is disabled due to conditions that disable or inhibit the system. The advanced parking assist control module requests the driver information center display PARK ASSIST OFF when it detects that one of the following conditions

  1. The parking assist system is manually disabled using the parking assist switch.
  2. An object is attached to the rear of the vehicle, such as a trailer, bicycle rack, trailer hitch receiver, or tow bar. Also, an object extending beyond a lowered tailgate will disable the system.
  3. The parking assist sensors are covered by snow, mud, dirt, slush, or ice.
  4. The vehicle bumper is damaged.
  5. Excessive paint thickness on a replacement parking assist sensor.
  6. The parking assist sensors are disrupted by vibrations, like those caused by a large nearby vehicle or from heavy equipment such as a jackhammer.

Object Detection Description and Operation (with Lane Departure Warning, UFL)

The lane departure warning system is a convenience feature of the front view camera that issues a warning when the system detects that the vehicle has unintentionally crossed a lane marking. The front view camera is located behind the windshield, looking out at the road ahead and detecting any lane markings. When the vehicle unintentionally leaves a detected lane, a visual and audible alert is given to the driver.

The lane departure warning system is made up of the following components

  1. Front view camera module
  2. Lane departure warning switch
  3. Instrument cluster / Vehicle Direction Display
  4. Radio

Front View Camera Module

The camera detects visual queues such as lane markings. When it is determined that the vehicle has unintentionally moved outside of the lane, a visual and audible warning is given to the driver. The front view camera module receives an input from the lane departure warning switch and controls the lane departure warning switch indicator output. The front view camera module also communicates via serial data with the instrument cluster and radio to request visual and audible alerts.

Lane Departure Warning Switch

The lane departure warning switch provides an input to the front view camera module to turn the lane departure warning system ON and OFF. The front view camera module provides a signal voltage to the normally open momentary switch. When the switch is pressed, the signal circuit is pulled to ground, indicating to the front view camera module that the system has been requested to turn ON or OFF. The lane departure warning switch also contains the lane departure warning switch indicator, which is controlled by the front view camera module to indicate the ON and OFF status of the lane departure warning system. When the system has been enabled by the lane departure warning switch, the front view camera module applies ground to the switch indicator and illuminates the LED. The location of the lane departure warning switch can vary with different vehicles. For the exact location please refer to the user's manual.

Instrument Cluster

The vehicle direction display contains green and amber lane departure warning indicators. These indicate to the driver the current status of the lane departure warning system and are controlled via serial data by the front view camera module. When the vehicle speed is above 56 km/h (35 MPH) and the system has detected the required lane markings and is ready to assist, the green indicator will be illuminated on the vehicle direction display. If the vehicle has unintentionally left the lane, the amber indicator will flash.

Radio

The radio controls the audible alert for the lane departure warning. If the vehicle has unintentionally left the lane, the radio will command three beeps as an audible alert to the driver.

Lane Departure Warning Operation

System operation can be describe by the following modes

  1. Off State: The system has been turned off by the driver, using the lane departure warning switch. The lane departure warning indicator will not be illuminated.
  2. Not Ready To Assist: The system is enabled and the lane departure warning indicator is illuminated, but not ready to assist when any of the following conditions is true: Vehicle speed is less than 56 km/h (35 MPH). The system is designed to function at speeds greater than 56 km/h (35 MPH). The system cannot detect lane markings. This may be because there are no lane markings, as on a country road or that the lane markings cannot be determined due to snow, rain, or other driving conditions. The windshield area in front of the camera or the camera lens is blocked by fog, dirt, damage to the windshield or other elements that may prevent the camera from detecting lane markings.
  3. Ready To Assist: The system is enabled and ready to warn of the unintentional lane crossing. The system is ready to assist when the green lane departure warning indicator is illuminated on the vehicle direction display.

Lane Crossing Alerts

  1. When one of the following conditions are met, the system will not give alerts: The correct turn signal is activated. An activated turn signal is interpreted as an intentional lane crossing. The operator makes an intentional steering maneuver. The operator makes an intentional accelerating maneuver. The operator makes an intentional braking maneuver.
  2. Lane crossing alert consists of the following: Three chimes are activated through the radio. The amber lane departure warning indicator will flash.

Lane Departure Warning System Driver Information Center Messages

The front view camera module can command the driver information center to display the various messages to alert the driver of a system concern or status information. For detailed information about the possible messages please refer to the user's manual.

Object Detection Description and Operation (with Forward Collision Alert, UEU)

The forward collision alert system is a convenience feature of the front view camera that issues a warning to the driver when a potential collision risk exists. The front view camera is located behind the windshield, looking out at the road ahead and detecting vehicles directly ahead, within a distance of approximately 60 meters (197 ft). The forward collision alert system is always active and operates at speeds above 40 kph (25 mph). When the system detects a vehicle in the path ahead, the green vehicle ahead indicator in the vehicle direction display is illuminated. When approaching another vehicle too rapidly, the collision alert symbol will flash in the vehicle direction display. Simultaneously an audible alert sounds. Forward collision alert does not warn the driver of any objects that are not detected as a vehicle, like e.g. pedestrians, animals, signs, guard rails, bridges, construction barrels or other stationary or slow moving objects. The forward collision alert timing sensitivity to control the distance to the vehicle ahead can be set using the forward collision alert switch in the left steering wheel controls.

In some cases the camera may detect a vehicle that is not in the path ahead, or the system may occasionally provide unrealistic alerts. This could respond to a turning vehicle ahead, guard rails, traffic signs, or other stationary objects. This is normal operation, the vehicle does not need service. Forward collision alert may sometimes set unnecessary alerts to turning vehicles, vehicles in other lanes, objects that are not vehicles, or shadows. These alerts are normal operation and the vehicle does not need service.

The forward collision alert system is made up of the following components

  1. Front view camera module
  2. Forward collision alert switch
  3. Instrument cluster / Vehicle direction display
  4. Radio

Front View Camera Module

The camera detects vehicles in front of the host vehicle. The front view camera module requests the green vehicle ahead alert indicator in the vehicle direction display ON via serial data when the front view camera system has detected a vehicle in the driving path ahead. The front view camera module also communicates via serial data with the driver information center and the radio to request visual and audible alerts.

  1. Lane departure warning system unavailable
  2. Forward collision alert OFF
  3. Service front camera

Forward Collision Alert Switch

The forward collision alert switch provides an input to the front view camera module to select the alert timing sensitivity when approaching another vehicle too rapidly. The front view camera module provides a signal voltage to the normally open switch. When the switch is pressed, the signal circuit is pulled to ground, indicating to the front view camera module that the system has been requested to change the alert timing sensitivity. The first button press shows the current alert timing setting on the driver information center. With every button press, the alert timing sensitivity is changed. The current alert timing setting will be maintained until it is changed. The preset alert timing setting is displayed in the top line of the driver information center. The position of the forward collision alert switch can vary with different vehicles. For the exact position please refer to the user's manual.

Instrument Cluster

The Vehicle direction display contains the green vehicle ahead indicator, which indicates to the driver that the Front View Camera system has detected a vehicle in the driving path ahead and is controlled via serial data. When approaching another vehicle too rapidly, the collision alert symbol will flash in the Vehicle direction display. The red Front collision alert display will stay continuously illuminated if the vehicle ahead remains much too close.

Radio

The radio controls the audible alert for the forward collision alert system. If the host vehicle is approaching another vehicle too rapidly, the radio will command an audible alert to the driver.

Forward Collision Alert System Driver Information Center Messages

The front view camera module can command the driver information center to display the various messages to alert the driver of a system concern or status information. For detailed information about the possible messages please refer to the user's manual.

Scheme 17

Scheme 17: Rearview Camera Description and Operation Block Diagram
Scheme 17: Rearview Camera Description and Operation Block Diagram
CalloutComponent Name
HWHard-Wired
HWHard-Wired
HWHard-Wired
K9K9 Body Control Module
B87B87 Rearview Camera
K74Human Machine Interface Control Module
P17P17 Info Display Module

Rear Vision Camera System Operation

The rear vision camera system consists of

  1. Rearview camera
  2. Body control module
  3. Human machine interface control module
  4. Info display module

When the transmission is placed into REVERSE, a 12 volt signal is sent to the rearview camera by the body control module. This signal indicates to the camera that the vehicle is in reverse and image display is requested. The rearview camera receives ignition voltage and a constant ground to power the camera. Video signal + and video signal - circuits carry the video image from the rearview camera to the human machine interface control module. The video signal is then transmitted to the info display module. Additionally, the video signal circuits are shielded to prevent any interference which may lead to a loss of video signal resolution and a degraded video image. The shield is provided a ground path by the rear vision camera.

The following conditions may cause a degraded rear vision camera image

  1. Ice, snow, or mud has built up on the rear vision camera
  2. Dark conditions
  3. Extreme light conditions, such as glare from the sun or the headlights of another vehicle
  4. Damage to the rear of the vehicle
  5. Extreme high temperatures or extreme temperature changes
  6. Defective video signal shielding

If a malfunction is detected in the system, Service Rear Vision Camera may be displayed on the infotainment display as an indicator to the customer that a problem exists that requires service.

Scheme 18

Scheme 18: Side Blind Alert Block Diagram
Scheme 18: Side Blind Alert Block Diagram
CalloutComponent Name
DASerial Data
HWHard-Wired
DBSerial Data - GMLAN Low Speed
HWHard-Wired
HWHard-Wired
B218RB218R Side Object Sensor Module - Right
B218LB218L Side Object Sensor Module - Left
A11A11 Radio
A9AA9A Outside Rearview Mirror - Driver
A9BA9B Outside Rearview Mirror - Passenger

The side blind zone alert system is a feature that utilizes two side object sensor modules to provide enhanced customer convenience by sensing and reporting to the driver that an object is present in one of the driver's side blind zones. This is communicated to the driver by illuminating an icon on the left or right side view mirror, depending on what side of the vehicle the object is detected. This lane change assist system is radar based system in which the sensors transmit and receives energy that is reflected from external objects and used to determine if that object is an object of interest. Although this system is intended to help drivers avoid lane change crashes, it does not replace driver vision and therefore should be considered a lane change aid.

Side Blind Zone Alert System Components

The side blind zone alert system is made up of the following components

  1. Left side object sensor module
  2. Right side object sensor module
  3. Driver outside rearview mirror
  4. Passenger outside rearview mirror

Side Object Sensor Modules

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool is able to communicate only with the left sensor.

When an object is detected in the left side blind zone, the side object sensor module sends a message to the right sensor through serial data. The right sensor then supplies voltage to illuminate the visual indicator on the left side outside rear view mirror. When an object is detected in the right side blind zone, the right side object sensor will supply a voltage to illuminate the visual indicator on the right side outside rear view mirror. Each sensor is supplied B+ and ground.

Outside Rearview Mirrors

The outside rearview mirrors contain an icon that is backlit with high intensity, amber-colored LED's located on the mirror surface. The display brightness adapts to day/night conditions. The side blind zone alert indicator icon in the left or right outside rearview mirror is illuminated if the left or right side object sensor module detects a vehicle in the side blind zone to inform the driver that there is a vehicle driving in the blind zone.

Side Blind Zone Alert Operation

The side blind zone alert system shall detect and report "objects of interest" on either side of the vehicle, within a specified "blind spot" zone. The system is designed to alert the driver, with a visual display placed on the side view mirror, to the presence of objects of interest that may not be visible in the inside rearview mirror and outside rear view mirrors. Although this system is intended to help drivers avoid lane change crashes, it does not replace driver vision and therefore should be considered a lane change aid. Even with the side blind zone alert system, the driver must check carefully for objects outside of the reporting zone before changing lanes. In the event that the system senses a malfunction through its diagnostic routines, the system will be disabled and the driver will be visually notified.

When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating. The warning symbols will vary brightness based on the ambient light conditions. Side blind zone alert is active when the vehicle is out of park or the parking brake is off on manual transmission vehicles. When the system detects a vehicle in the side blind zone while driving forward, an amber warning symbol will light up in the appropriate outside mirror. This indicates that it may be unsafe to change lanes. If the driver then activates the turn signal, the amber warning symbol starts flashing as an extra warning not to change lanes.

The system is designed to detect objects of interest as small as a 125cc motorcycle with rider. The detection zone starts at the outside rearview mirror and extends out to 3.5 m (11 ft) at the back corner of the vehicle and 5m (16 ft) behind the vehicle at a height of 0.5 m (1.5 ft) to 2.0 m (6 ft) above the ground. The side blind zone system does not detect stationary objects such as guardrails, posts, curbs, walls, berms, bridges, or parked vehicles.

If the vehicle is towing a trailer or has an object such as a bicycle rack attached to the rear of the vehicle, the side blind zone system may not function properly and the indicators may illuminate intermittently or remain illuminated all the time. The driver information center may display "SIDE DETECTION SYSTEM UNAVAILABLE".

Foul weather may affect the operation of the side blind zone system. Occasional missed alerts can occur under normal circumstances and will increase in wet conditions. The number of missed alerts will increase with increased rainfall or road spray. Heavy rainfall, as well as mud, dirt, snow, ice, or slush build-up on the rear fascia, can completely disable the system. The warning symbols will vary brightness based on the ambient light conditions.

Side Blind Zone Alert Driver Information Center Messages

SIDE BLIND ZONE ALERT OFF

This message indicates that the system has been disabled through the driver information center. Refer to the vehicle owners manual for instructions on how to set personalization options on the driver information center.

SERVICE SIDE DETECTION SYSTEM

This message indicates that the system requires service. When the message is displayed, the indicators may remain illuminated at all times, notifying the driver that the side blind zone system should not be relied upon when changing lanes. Check vehicle for DTCs to determine the cause of this notification.

SIDE DETECTION SYSTEM UNAVAILABLE

This message indicates that the system has been temporarily disabled because the sensor is blocked or can otherwise not accurately detect vehicles or objects. Verify there is no damage to rear fascia or there are any bumper stickers that may interfere with the radar signals. Ask the customer if any of the following circumstances were present when the system became unavailable: towing a trailer, having a bike rack attached, mud, dirt, snow, ice, or slush build-up on the rear fascia, heavy rainfall, or excessive road spray.

Scheme 19

Scheme 19: Rear Cross Traffic Alert Block Diagram
Scheme 19: Rear Cross Traffic Alert Block Diagram
CalloutComponent Name
HWHard-Wired
DASerial Data
DBSerial Data - GMLAN Low Speed
DBSerial Data - GMLAN Low Speed
HWHard-Wired
HWHard-Wired
B218RB218R Side Object Sensor Module - Right
B218LB218L Side Object Sensor Module - Left
A11A11 Radio
K40K40 Seat Memory Control Module
P45LRSeat Haptic Movement Motor - Driver Left Rear
P45RRSeat Haptic Movement Motor - Driver Right Rear

The rear cross traffic alert system is a feature that utilized two side object sensor modules to provide enhanced customer convenience while backing up by sensing and providing warnings to the driver on impending rear cross traffic. The rear cross traffic alert system is designed to detect and track objects of interest within a specified coverage zone behind the vehicle. The system is designed to alert the driver, with a visual display and either an audible sound or a haptic warning, if equipped and enabled, to the presence of objects of interest that may cause a collision with the host vehicle. Although the system is intended to assist drivers in backing up, it does not replace driver's vision. The driver is responsible to check carefully for objects outside of the coverage zone (e.g., a fast approaching vehicle) for a safe backing maneuver.

Rear Cross Traffic Alert System Components

The side blind zone alert system is made up of the following components

  1. Left side object sensor module
  2. Right side object sensor module
  3. Visual Display Icons located on the infotainment display screen
  4. Audio system chime
  5. Haptic safety seat (if equipped)

Side Object Sensor Modules

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool is able to communicate only with the left sensor.

When an object is detected in the left rear cross traffic zone, the side object sensor module sends a serial data message to the human interface module and memory seat module to provide alerts. Each sensor is supplied B+ and ground.

Display Icons

The rear cross traffic alert system visual alert display consists of two visual icons, one on each side of the display screen of the rearview camera display, that are used to alert the driver on rear cross traffic from each side of the host vehicle respectively. In addition to visual indicators, the audio system will beep (if enabled) and the haptic safety seat will vibrate (if equipped and enabled). Refer to owner's manual for vehicle customization.

Audio or Haptic Notification

The alert output type can be driver selected to either audio or haptic. The chime location will be left rear for left rear cross traffic alert and right rear for right rear cross traffic alert. The haptic seat system response will be to generate 3 repetitions of haptic vibration in the left rear area of the seat for left cross traffic alert and right rear area of the seat for right cross traffic alert. If there is a problem with the haptic seats, the audio chime will be substituted.

Rear Cross Traffic Alert Operation

The rear cross traffic alert system is designed to detect objects of interest as small as a 125cc motorcycle with rider. The detection zone extends approximately 30m (99 ft) from the rear corner of the car and covers an area from behind the vehicle to 125 degrees towards the front at a height of 0.45m (1.5 ft) to 2m (6.5 ft) above ground. The system operates when vehicle speed is 10 kph (6 mph) or less and is designed to detect objects moving at speeds up to 36 kph (22 mph).

When the vehicle is backing up, the side object sensors receive energy that is reflected from external objects and determine if the objects are objects of interest or not. The system may at times detect pedestrians, shopping carts, or similar moving objects. This is normal and should not be considered as a false alert or problem with the system. The rear cross traffic alert system will estimate vehicle travel trajectory and use the information in conjunction with object travel trajectory information to determine if there is a potential collision between the vehicle and the object of interest. The rear cross traffic alert function will only alert on objects of interest that pose a potential collision with the host vehicle. The system is not designed to provide an alert to objects that have no potential collision with vehicle. In addition, the system will not alert to stationary objects such as signs, parked cars, etc.

If the vehicle is towing a trailer or has an object such as a bicycle rack attached to the rear of the vehicle, the rear cross traffic alert system may not function properly.

Foul weather may affect the operation of the rear cross traffic alert system. Occasional missed alerts can occur under normal circumstances and will increase in wet conditions. The number of missed alerts will increase with increased rainfall or road spray. Heavy rainfall, as well as mud, dirt, snow, ice, or slush build-up on the rear fascia, can completely disable the system.

Rear Cross Traffic Alert Driver Information Center Messages

REAR CROSS TRAFFIC ALERT OFF

This message indicates that the system has been disabled through the driver information center. Refer to the vehicle owners manual for instructions on how to set personalization options on the driver information center.

SERVICE SIDE DETECTION SYSTEM

This message indicates that the system requires service. Since the side object sensors are also used for side blind zone alert and/or lane change alert, these feature will also be inoperative. Check vehicle for DTCs to determine the cause of this notification.

SIDE DETECTION SYSTEM TEMPORARILY UNAVAILABLE

This message indicates that the system has been temporarily disabled because the sensors are blocked or can otherwise not accurately detect vehicles or objects. Verify there is no damage to rear fascia or there are any bumper stickers that may interfere with the radar signals. Ask the customer if any of the following circumstances that present when the system became unavailable: mud, dirt, snow, ice, or slush build-up on the rear fascia, heavy rainfall, or excessive road spray.

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
• Symptom Byte List
• Interior Backlighting Malfunction
• Instrument Panel Multifunction Switch Replacement
• Cruise Control Switch Replacement
• Diagnostic Trouble Code (DTC) List - Vehicle
• Data Communication Schematics
• Data Link Communications Description and Operation
• Power Mode Mismatch
• Checking Aftermarket Accessories
• Outside Rearview Mirror Glass Replacement
• SIR Warning
• Driver or Passenger Seat Removal and Installation
• Splicing Copper Wire Using Splice Sleeves
• Battery Negative Cable Disconnection and Connection
• Front Bumper Fascia Removal and Installation
• Fastener Caution
• Instrument Panel Extension Replacement
• Rear Compartment Floor Stowage Trim Compartment Replacement
• Basecoat/Clearcoat Paint Systems
• Paint Gauges
• Rear Closure Center with License Plate Applique Replacement
• DTC B010E
• Object Detection Description and Operation (with Front and Rear Park Assist, UD5)
• Front View Camera Module Calibration
• Symptoms - Object Detection
• Forward Range Radar Module Alignment
• Forward Range Radar Module Inspection