Instrument Panel System Displays &amp; Gauges Cadillac SRX II

Connector End View Reference

Description and Operation

Driver Information Center (DIC) Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/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

Ignition ON, observe the scan tool Ambient Air Temperature parameter. The reading should be between -40°C (-40°F) to +88°C (+190°F) and change with air temperature changes.

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor.
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal A and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the P16 Instrument Cluster. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Ambient Air Temperature parameter displays greater than 54 °C (130 °F). If less than the specified range, test the low reference circuit a short to voltage or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
If all circuits test normal, test or replace the B9 Ambient Air Temperature Sensor.

Static Test

Test the B9 Ambient Air Temperature Sensor by varying the sensor temperature while monitoring the sensor resistance.
Compare the readings with the «Ambient Air Temperature Sensor Resistance»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__ambient-air-temperature-sensor-resistance) . If not within the specified range, replace the B9 Ambient Air Temperature Sensor.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Ambient Air Temperature Gauge Sensor Replacement»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for module replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The instrument cluster is equipped with odometers that indicate the distance traveled by the vehicle. One type of odometer is the season odometer where the traveled distance can not be reset by the driver. This information is also stored in the body control module (BCM). In addition to storing the season odometer value for the vehicle, the instrument cluster and the BCM store the VIN. Software checks are performed to ensure these modules, and their stored season odometer information, can not be moved or transferred between different vehicles.

The ignition is ON.

Conditions for Setting the DTC

The BCM has detected an internal memory malfunction.

DTC B0550 32 is stored in the BCM memory.

The BCM no longer detects a malfunction.

Schematic Reference

Connector End View Reference

Driver Information Center (DIC) Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify that DTC B0550 32 is not set.

If the DTC is set, program the K9 BCM. Verify that DTC B0550 32 does not reset. If the DTC resets, replace the K9 BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) receives LIN-Bus messages from the transmission range indicator module. If there is a checksum or memory malfunction in the transmission range indicator module it broadcast this message to the BCM.

Ignition ON

The BCM detects a checksum or memory fault in the transmission range indicator module.

The driver information center does not display the actual gear selector position.

The DTC becomes history when the condition for setting the DTC is no longer present.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Driver Information Center (DIC) Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Replace the S3 Automatic Transmission Shift Lever and verify that the DTC does not reset.

If the DTC resets, replace the K9 Body Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Automatic Transmission Range Selector Lever Replacement»(/cadillac/srx/ii-2009-2012/remont/automatic-trans/#automatic-transmission-af40-6-repair-instructions-on-vehicle) for MXE
«Automatic Transmission Range Selector Lever Replacement»(/cadillac/srx/ii-2009-2012/remont/automatic-trans/#automatic-transmission-6t706t75-repair-instructions-on-vehicle) for MH2, MH4
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Instrument Cluster Ignition Terminal 19	B1370 06	B1370 06	B1370 01
Ignition Run/Crank Relay Ignition	B1370 06	B1370 06
Ignition Run/Crank Relay Ground		B1370 06
Ignition Run/Crank Relay B+		B1370 06

The vehicle power mode master is the body control module (BCM). The ignition switch is a low current switch with multiple discrete circuits to the BCM.

The power mode master will activate relays and other direct outputs of the power mode master as needed according to the calculated power mode. Some relays controlled by the BCM are switched ignition voltage outputs that are pass through circuits within the BCM directly from the ignition switch. If these circuits short to ground, the B+ circuit fuse to the ignition switch will open.

B1370 01

Ignition switch is in the Accessory position.

B1370 06

Ignition switch is in the Accessory, Run, or Crank positions.

Ignition circuit is shorted to voltage.

B1370 06

Ignition circuit is open.
Ignition or run/crank relay circuit is shorted to ground.
B+ circuit of the ignition run/crank relay is open or shorted to ground.
Ignition run/crank relay control circuit open, including relay coil and ground.

The Instrument Cluster still functions except check engine light is always off.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

«Instrument Cluster Schematics»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Power Distribution Schematics»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-wiring-schematics-and-wiring-harness-routing-diagrams)
«Power Moding Schematics»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-wiring-schematics-and-wiring-harness-routing-diagrams)

Connector End View Reference

Description and Operation

«Instrument Cluster Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Power Mode Description and Operation»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-description-and-operation)

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify that DTC B144B is not set.

If the DTC is set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .

Ignition OFF, disconnect the KR74 ignition run relay.
Test for less than 10 ohms between the ground circuit terminal 86 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the Ignition circuit terminal 85 and ground. If the test lamp does not illuminate, test the Ignition circuit for an open/high resistance. If the circuit tests normal replace the K9 BCM.
Ignition OFF, reconnect the KR74 ignition run relay.
Disconnect the harness connector at the P16 instrument cluster.
Ignition ON, verify that a test lamp illuminates between the ignition terminal 19 and ground. If the test lamp does not illuminate and the Ignition fuse is good, test the ignition circuit for an open/high resistance. If the circuit tests normal, replace the KR74 ignition run relay. If the ignition fuse is open, test the ignition circuit for a short to ground. If the circuit tests normal, replace the P16 instrument cluster.
If all circuits test normal, replace the P16 instrument cluster.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Instrument Cluster Replacement»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Relay Replacement (Attached to Wire Harness)»(/cadillac/srx/ii-2009-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions) or «Relay Replacement (Within an Electrical Center)»(/cadillac/srx/ii-2009-2012/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The driver information center switch is a multiplexed switch. Battery power is provided to the driver information center switch via the instrument cluster. The driver information center switch signal circuit is pulled up to battery voltage in the instrument cluster. The instrument cluster also provides the driver information center switch with a low reference. The switch input to the instrument cluster is pulled low when a switch is activated. The driver information center switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The instrument cluster monitors the driver information center switch signal circuit to determine the driver information center switch inputs. Each switch state Menu, Up, Down, Clear corresponds to a certain resistance value. The instrument cluster determines the switch pressed by the voltage drop across the resistors.

The ignition is in OFF, ACCESSORY or RUN position.
The system voltage is between 9-16 V.

B3567 01

The instrument cluster detects that the driver information center switch signal circuit is shorted to battery.

B3567 02

The instrument cluster detects that the driver information center switch signal circuit is shorted to ground.

B3567 04

The instrument cluster detects that the driver information center switch signal circuit is open.

B3567 59

The instrument cluster detects that the driver information center switch is stuck.

The instrument cluster ignores the driver information center switch inputs.

The DTC will become history if the instrument cluster no longer detects a malfunction.

Schematic Reference

Connector End View Reference

Driver Information Center (DIC) Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Driver Information Center Switch parameter, that when the S78 Turn Signal/Multi-Function Switches Menu, Up, Down Set/Clr are pressed and released the scan tool parameter toggles between Menu, Up, Down, Clear and Inactive.

Ignition OFF, disconnect the X2 harness connector at the S78 Turn Signal/Multi-Function Switch.
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 5 and ground. If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal replace the P16 Instrument Cluster. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal replace the P16 Instrument Cluster.
Test for B+ between the signal circuit terminal 12 and ground. If less than the specified value, test the signal for a short to ground or an open/high resistance. If the circuit tests normal replace the P16 Instrument Cluster.
Install a 5 A fused jumper wire between the signal circuit terminal 12 and the low reference circuit terminal 6. Verify the scan tool Driver Information Center Switch parameter displays 0 V. If not the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal replace the P16 Instrument Cluster.
If all circuits tests normal, test or replace the S78 Turn Signal/Multi-Function Switch.

Ignition OFF, disconnect the harness connectors at the S78 Turn Signal/Multi-Function Switch.
Test for 8.8-9.0k ohms between the signal terminal 12 X2 and the low reference circuit terminal 6 X2. If not within the specified range, replace the S78 Turn Signal/Multi-Function Switch.
Test for 550-650 ohms between the signal terminal 12 X2 and the low reference circuit terminal 6 X2 while pressing the Up switch. If not within the specified value, replace the S78 Turn Signal/Multi-Function Switch.
Test for 1.5-1.7k ohms between the signal terminal 12 X2 and the low reference circuit terminal 6 X2 while pressing the Down switch. If not within the specified value, replace the S78 Turn Signal/Multi-Function Switch.
Test for 3.3-3.7k ohms between the signal terminal 12 X2 and the low reference circuit terminal 6 X2 while pressing the Set/Clr switch. If not within the specified value, replace the S78 Turn Signal/Multi-Function Switch.
Test for less than 30 ohms between the signal terminal 5 X2 and the ground circuit terminal 3 X2 while pressing the Menu switch. If greater than the specified value, replace the S78 Turn Signal/Multi-Function Switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Turn Signal Multifunction Switch Replacement»(/cadillac/srx/ii-2009-2012/remont/steering-column-switches/#steering-wheel-and-steering-column)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for instrument cluster replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Fuel Level Sensor 1 Signal	P0462	P0463	P0463	P0461
Fuel Level Sensor 2 Signal	P2067	P2068	P2068	P2066
Low Reference		1	P0463, P0464, P2068	P0461, P2066
1. Fuel Gauge Inoperative

The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The engine control module (ECM) monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the fuel level percentage via Low Speed CAN-Bus to the instrument cluster in order to control the fuel gauge.

The engine is running
The system voltage is between 11-16 V

P0461 or P2066

The ECM detects a difference between the fuel consumed by the engine and change of the fuel level signal of less than 1 L (0.26 gal) over a range of 30 L (7.92 gal) or 45.6% of the primary fuel tank.
The above condition is present for about 300 seconds.

P0462 or P2067

The signal voltage is less than 0.25 V.
The above conditions must be met for 5 seconds.

P0463 or P2068

The signal voltage is greater than 4.7 V.
The above conditions must be met for 5 seconds.

P0464

The fuel level change is greater than 10%.
The above conditions must be met for 30 seconds.
DTC P0464 runs and fails 2 out of 3 test cycles.

P0461, P0462, P0463, P0464, P2066, P2067 and P2068 are Type B DTCs
The fuel gauge defaults to empty
The low fuel indicator illuminates

P0461, P0462, P0463, P0464, P2066, P2067 and P2068 are Type B DTCs
The DTC becomes history when the conditions for setting the DTC are no longer present.
The history DTC clears after 40 malfunction-free warm-up cycles.

Schematic Reference

Connector End View Reference

Description and Operation

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool ECM - Fuel Level Sensor parameters. The reading should be between 0.5-3.5 V and vary with fuel level.
Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the fuel level gauge sweeps from its low to high position If the fuel level gauge does not sweep, replace the P16 Instrument Cluster.
Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF. If the low fuel level indicator always stays on or always off, replace the P16 Instrument Cluster.

Ignition OFF, disconnect the harness connector at the appropriate fuel level sensor.
Test for less than 30 ohms at the low reference circuit terminal C. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal D and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
If all circuits test normal, replace the appropriate fuel level sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Primary Fuel Level Sensor Replacement»(/cadillac/srx/ii-2009-2012/remont/testing-diagnostics/#engine-control-system-fuel-system-28l-30l-repair-instructions)
«Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2009-2012/remont/testing-diagnostics/#engine-control-system-fuel-system-28l-30l-repair-instructions)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the ECM replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Signal	1	P0520	1
Low Reference		P0520
1. Engine Oil Pressure Indicator Malfunction

Typical Scan Tool Data

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine Running Parameter Normal Range: OK
Signal	Low	OK	OK
Low Reference		OK

ECM - Engine Oil Pressure Switch

The engine oil pressure switch is a normally closed switch that opens with the proper oil pressure. With the ignition switch turned ON and the engine not running, the engine control module (ECM) should detect a low signal voltage input. With the engine running, the engine oil pressure switch opens and the ECM should detect a high signal voltage input. When the oil pressure is low, the ECM sends a message via High Speed CAN-Bus to the body control module (BCM). The BCM then sends a message via Low Speed CAN-Bus to the instrument cluster requesting the engine oil pressure indicator turned ON.

The engine is running.

The ECM detects that the engine oil pressure switch signal circuit is pulled low.
The above condition is present for greater than 10 seconds.

The instrument cluster illuminates the service vehicle soon indicator and the oil pressure low indicator.

The DTC becomes history when the conditions for setting the DTC are no longer present.

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Description and Operation

«Instrument Cluster Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Indicator/Warning Message Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Driver Information Center (DIC) Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__driver-information-center-dic-description-and)

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Engine Oil Pressure Switch parameter with the ignition switch turned ON and the engine not running the reading should be Low, with the engine running the reading should be OK.

Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
If applicable, test for less than 30 ohms between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
Ignition ON, verify the scan tool Engine Oil Pressure Switch parameter is OK. If not the specified value, test for the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
Install a 3 A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Engine Oil Pressure Switch parameter is Low. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
If all circuits test normal, test or replace the B37 Engine Oil Pressure Switch.

Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
Test for infinite resistance between the signal terminal A and the low reference terminal B with the switch in the open position. If not the specified value, replace the B37 Engine Oil Pressure Switch.
Test for less than 5 ohms between the signal terminal A and the low reference terminal B with the switch in the closed position. If greater than the specified range, replace the B37 Engine Oil Pressure Switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Engine Oil Pressure Sensor and/or Switch Replacement (LF1)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2) or «Engine Oil Pressure Sensor and/or Switch Replacement (LAU)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5 V Reference	P0522	P0523	P0523	P0521
Signal	P0522	P0523	P0523	P0521
Low Reference		P0523		P0521

The engine oil pressure sensor changes voltage based on the engine oil pressure. The engine oil pressure sensor is a 3-wire sensor comprised of the signal circuit, the low reference circuit and the 5 V reference circuit. The engine control module (ECM) supplies 5 V to the engine oil pressure sensor via the 5 V reference circuit and provides ground via the engine oil pressure sensor low reference circuit. The ECM monitors the signal circuit of the engine oil pressure sensor to determine the engine oil pressure sensor voltage is within the normal operating range of approximately 1-4 V. When the engine oil pressure is high, the engine oil pressure sensor voltage is high and the sensor senses a high signal voltage. When the engine oil pressure is low, the engine oil pressure sensor voltage is low and the ECM senses a low signal voltage. The ECM sends the engine oil pressure sensor information via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the engine oil pressure sensor information via Low Speed CAN-Bus to the instrument cluster.

The engine is running

P0521

The engine oil pressure is out of its working range.
The ECM does not detect a change in the engine oil pressure.
The above condition is present over a predetermined variance of engine speed.

P0522

The ECM detects a short to ground in the engine oil pressure signal circuit.
The above condition is present for greater than 10 seconds.

P0523

The ECM detects a short to voltage or an open circuit in the engine oil pressure signal circuit.
The above condition is present for greater than 10 seconds.

The instrument cluster illuminates the service vehicle soon indicator.

The DTC becomes history when the conditions for setting the DTC are no longer present.

Schematic Reference

Connector End View Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Description and Operation

«Instrument Cluster Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Indicator/Warning Message Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Driver Information Center (DIC) Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__driver-information-center-dic-description-and)

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

DTC Type Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, observe the scan tool Engine Oil Pressure Sensor parameter. The reading should be between 0.3-4.8 V.

Ignition OFF, disconnect the harness connector at the B37B Engine Oil Pressure Sensor.
Ignition OFF, test for less than 10 ohms between the low reference circuit terminal 1 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 2 and ground. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module. If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
Verify the scan tool Engine Oil Pressure Sensor parameter is greater than 4.8 V. If less than the specified range, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
Install a 3 A fused jumper wire between the signal circuit terminal 3 and the low reference circuit terminal 1. Verify the scan tool Engine Oil Pressure Sensor parameter is less than 0.3 V. If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
If all circuits test normal, replace the B37B Engine Oil Pressure Sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Engine Oil Pressure Sensor and/or Switch Replacement (LF1)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2) or «Engine Oil Pressure Sensor and/or Switch Replacement (LAU)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ECM replacement, setup and programming.

Symptoms - Displays and Gauges

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

Before using the symptom diagnostic tables, perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) in order to determine that there are no DTCs set, and that the control modules can communicate via the serial data link
Review the system operation in order to understand the system functions. Refer to the following description and operations: «Instrument Cluster Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) «Indicator/Warning Message Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) «Driver Information Center (DIC) Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__driver-information-center-dic-description-and) «Audible Warnings Description and Operation»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__audible-warnings-description-and-operation)

Visual/Physical Inspection

Inspect for aftermarket devices which can affect the operation of the instrument panel cluster or the audible warning systems. Refer to «Checking Aftermarket Accessories»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can cause the symptom.
Inspect for the proper fluid levels.

Intermittent

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

Symptom List

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

Gauges and Odometer

«Instrument Cluster Gauges Inoperative»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Fuel Gauge Inaccurate or Inoperative»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Odometer Trip/Reset Switch Inoperative»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Speedometer and/or Odometer Inaccurate or Inoperative»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)

Indicators

«ABS Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system)
«Adaptive Forward Lighting Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system)
«Air Bag Indicator Circuit Malfunction (Driver)»(/cadillac/srx/ii-2009-2012/remont/airbag/#supplemental-inflatable-restraint-system) or «Air Bag Indicator Circuit Malfunction (Passenger)»(/cadillac/srx/ii-2009-2012/remont/airbag/#supplemental-inflatable-restraint-system)
«Brake Warning Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/mechanical-hydraulic/#hydraulic-brake-system)
«Charge Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Door Ajar Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/door-locks-anti-theft-systems/#door-lock-system-door-handles)
«Park Brake System Diagnosis»(/cadillac/srx/ii-2009-2012/remont/parking-brake-system/#parking-brake-system__park-brake-system-diagnosis)
«Engine Oil Pressure Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Front Fog Lamps Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system)
«Headlamps Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system)
«Low Tire Pressure Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/warning-system/#tire-pressure-monitoring-system)
«Inspection/Maintenance Complete System Set Procedure»(/cadillac/srx/ii-2009-2012/remont/testing-diagnostics/#engine-control-system-fuel-system-28l-30l-symptom-troubleshooting-and-diagnosis)
«Rain Sensor Malfunction»(/cadillac/srx/ii-2009-2012/remont/wiperwasher-systems/#wiper-system-washer-system__rain-sensor-malfunction)
«Rear Fog Lamps Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system)
«Seat Belt Indicator Circuit Malfunction - Driver»(/cadillac/srx/ii-2009-2012/remont/restraints-control-systems/#seat-belt-system)
«Security Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/door-locks-anti-theft-systems/#theft-deterrent-system)
«Traction Control/Stability Control Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/anti-locktraction-control/#antilock-brake-system-with-traction-control-system-stability-control-system)
«Turn Signal Lamps and/or Indicators Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system)
«Washer Malfunction»(/cadillac/srx/ii-2009-2012/remont/wiperwasher-systems/#wiper-system-washer-system)

Driver Information Center

«Driver Information Center Switch Malfunction»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Outside Air Temperature Display Inaccurate or Inoperative»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)

Audible Warnings

Chime Malfunction

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The engine control module (ECM) uses the generator turn ON signal circuit to control the load of the generator on the engine. A high side driver in the ECM applies voltage to the voltage regulator. This signals the voltage regulator to turn the field circuit ON and OFF. The ECM monitors the state of the generator turn ON signal circuit. The ECM should detect low voltage on the generator turn on signal circuit when the ignition is ON and the engine is OFF, or when the charging system malfunctions. With the engine running, the ECM should detect high voltage on the generator turn on signal circuit. The ECM performs key ON and RUN tests to determine the status of the generator turn on signal circuit. If a malfunction is detected the ECM will illuminate the charge indicator in the instrument cluster.

Schematic Reference

Connector End View Reference

Indicator/Warning Message Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, engine running, verify the scan tool Battery Voltage parameter is between 12.5-15.5 V. If not within the specified range, refer to «Charging System Test»(/cadillac/srx/ii-2009-2012/remont/charging-system/#battery-charging-system-and-starting-system) .
Command the All Indicators test ON and OFF with the scan tool, verify that the charge indicator turns ON and OFF. If the charge indicator always stays on or always off, replace the P16 Instrument Cluster.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Instrument Cluster replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The radio or the chime module, if not equipped with a radio, generates the audible warnings. The instrument cluster, the body control module (BCM), the inflatable restraint sensing and diagnostic module (SDM) or the object alarm module request audible warnings via Low Speed CAN-Bus signals.

Schematic Reference

Audible Warnings Schematics

Connector End View Reference

Audible Warnings Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/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. Before performing this diagnostics, make sure no indicators are illuminated after the instrument cluster performs a lamp test. If any indicators are illuminated after the bulb test, perform the indicator diagnostics before this diagnostics.

without Radio

Ignition ON, perform the Chime test with the scan tool, verify that all audible warnings sound normal.

If the audible warnings do not operate properly, replace the P5 Chime Alarm Control Module.

with Radio

Ignition ON, radio ON, adjust the radio balance and fade to each speaker. If any speaker does not operate properly, refer to «Speaker Malfunction»(/cadillac/srx/ii-2009-2012/remont/entertainment-systems/#cellular-systems-entertainment-systems-navigation-systems) .
Ignition ON, buckle up driver seat belt, verify the scan tool Driver Seat Belt Status parameter is Buckled. If not Buckled refer to «Seat Belt Indicator Circuit Malfunction - Driver»(/cadillac/srx/ii-2009-2012/remont/restraints-control-systems/#seat-belt-system) .
Ignition ON, headlamp switch OFF, verify the scan tool Headlamp On Switch parameter is Inactive. If not Inactive, refer to «Headlamps Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system) .
Ignition ON, parking lamp switch OFF, verify the scan tool Parklamp Switch parameter is Inactive. If not Inactive, refer to «Park, License, and/or Tail Lamps Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system) .
Ignition ON, turn signal switch OFF, verify the scan tool Left Turn Signal Switch parameter and the scan tool Right Turn Signal Switch parameter is Inactive. If not Inactive, refer to «Turn Signal Lamps and/or Indicators Malfunction»(/cadillac/srx/ii-2009-2012/remont/exterior-lights/#lighting-system) .
Ignition ON, parking brake released, verify the scan tool Park Brake Switch parameter is Inactive. If not Inactive, refer to «Park Brake System Diagnosis»(/cadillac/srx/ii-2009-2012/remont/parking-brake-system/#parking-brake-system__park-brake-system-diagnosis) .
Ignition ON, doors closed, verify that all scan tool parameters listed below are Inactive. Driver Door Ajar Switch Passenger Door Ajar Switch Left Rear Door Ajar Switch Right Rear Door Ajar Switch If any are not Inactive, refer to «Door Ajar Indicator Malfunction»(/cadillac/srx/ii-2009-2012/remont/door-locks-anti-theft-systems/#door-lock-system-door-handles) .
Verify the scan tool Key in Ignition Status parameter is Inactive when the key is in the ignition and Active when the key is out of the ignition. If the scan tool parameter does not operate properly, replace the K9 Body Control Module.
Ignition ON, verify that the scan tool Park Assist Switch parameter is Active when the parking assist is active and Inactive when the parking assist is Inactive. If the scan tool parameter does not operate properly, refer to «Parking Assist System Malfunction»(/cadillac/srx/ii-2009-2012/remont/collisionavoidance/#object-detection-system) .
If all tests operate properly, replace the A11 Radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM, Radio or Chime Module replacement, setup and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The driver information center switch is a multiplexed switch. Battery power is provided to the driver information center switch via the instrument panel cluster. The driver information center switch signal circuit is pulled up to battery voltage in the instrument panel cluster. The instrument cluster also provides the driver information center switch with a low reference. The switch input to the instrument cluster is pulled low when a switch is activated. The driver information center switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The instrument cluster monitors the driver information center switch signal circuit to determine the driver information center switch inputs. Each switch state - Menu, UP, DOWN - corresponds to a certain resistance value. The instrument cluster determines the switch pressed by the voltage drop across the resistors.

Schematic Reference

Connector End View Reference

Driver Information Center (DIC) Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Driver Information Center Switch parameter, that when the S78 Turn Signal/Multi-Function Switch Menu is pressed and released the scan tool parameter toggles between Menu and Inactive. If not the specified value, refer to «Menu Switch Circuit Test»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__menu-switch-circuit-test) .
Ignition ON, observe the scan tool Driver Information Center Switch parameter, that when the S78 Turn Signal/Multi-Function Switch UP, DOWN, SET/CLR are pressed and released the scan tool parameter toggles between Up, Down, Clear and Inactive. If not the specified value, refer to «UP, Down, or Set/Clear Switch Circuit Test»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__up-down-or-setclear-switch-circuit) .

Ignition OFF, disconnect the X2 harness connector at the S78 Turn Signal/Multi-Function Switch.
Test for less than 30 ohms between the ground circuit terminal 3 X2 and ground. If less than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, test for greater than 4.8 V between the signal circuit terminal 5 and ground. If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal replace the P16 Instrument Cluster.
If all circuits tests normal, replace the S78 Turn Signal/Multi-Function Switch.

UP, Down, or Set/Clear Switch Circuit Test

Ignition OFF, disconnect the X2 S78 Turn Signal/Multi-Function Switch.
While holding the Switch UP arrow in the UP position, test for 0.55-0.65k ohms between the signal circuit terminal 12 X2 and the low reference terminal 6 X2 at the switch. If not within the specified range, replace the S78 Turn Signal/Multi-Function Switch.
While holding the Switch DOWN arrow in the DOWN position, test for 1.5-1.7k ohms between the signal circuit terminal 12 X2 and the low reference terminal 6 X2 at the switch. If not within the specified range, replace the S78 Turn Signal/Multi-Function Switch.
While depressing the Switch Set/Clr button, test for 3.0-4.0k ohms between the signal circuit terminal 12 X2 and the low reference terminal 6 X2 at the switch. If not within the specified range, replace the S78 Turn Signal/Multi-Function Switch.
If all circuits tests normal, replace P16 Instrument Cluster.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Turn Signal Multifunction Switch Replacement»(/cadillac/srx/ii-2009-2012/remont/steering-column-switches/#steering-wheel-and-steering-column)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the instrument cluster replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Signal	1	P0520	1
Ground		P0520
1. Engine Oil Pressure Indicator Malfunction

Schematic Reference

Connector End View Reference

Indicator/Warning Message Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool ECM - Engine Oil Pressure Switch parameter with the ignition switch turned ON and the engine not running the reading should be Low with the engine running the reading should be OK.
Ignition ON, command the All Indicators test ON and OFF with the scan tool, verify that the engine oil pressure indicator changes between turn ON and OFF. If the engine oil pressure indicator always stays on or always off, replace the P16 Instrument Cluster.

Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
Ignition ON, verify the scan tool ECM - Engine Oil Pressure Switch parameter is OK. If not the specified value, test for the signal circuit terminal 9 X3 for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
Install a 3 A fused jumper wire between the signal circuit terminal 9 X3 and ground. Verify the scan tool ECM - Engine Oil Pressure Switch is Low. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
Command the All Indicators test ON and OFF with the scan tool. The engine oil pressure indicator should turn ON and OFF when changing between the commanded states. If the engine oil pressure indicator always on or always off, replace the P16 Instrument Cluster.
If all circuits test normal, test or replace the B37 Engine Oil Pressure Switch.

Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch.
Test for infinite resistance between the signal terminal A and ground with the switch in the open position. If not the specified value, replace the B37 Engine Oil Pressure Switch.
Test for less than 5 ohms between the signal terminal A and ground with the switch in the closed position. If greater than the specified range, replace the B37 Engine Oil Pressure Switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Engine Oil Pressure Sensor and/or Switch Replacement (LF1)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2) or «Engine Oil Pressure Sensor and/or Switch Replacement (LAU)»(/cadillac/srx/ii-2009-2012/remont/mechanical/#engine-mechanical-28l-or-30l-repair-instructions-on-vehicle-2-of-2)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for instrument cluster or ECM replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The instrument cluster displays the fuel level based on the information from the engine control module (ECM). The ECM converts the data from the fuel level sensors to a fuel level signal. The ECM sends the fuel level signal via a High Speed CAN-Bus signal to the body control module (BCM). The BCM then sends the information via a Low Speed CAN-Bus signal to the instrument cluster to display the fuel level. When the fuel level falls below 11% the instrument cluster illuminates the low fuel level indicator.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the fuel level gauge sweeps from its low to high position. If the fuel level gauge does not sweep, replace the P16 Instrument Cluster.
Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF. If the low fuel level indicator does not turn ON or OFF as commanded, replace the P16 Instrument Cluster.
Observe the scan tool ECM Fuel Level Sensor parameter. The reading should be 0.5-3.5 V and vary with fuel level. If the reading does not vary with fuel level, refer to «DTC P0461-P0464, P2066, P2067, or P2068»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) .
If the fuel level gauge does sweep and the low fuel level indicator turns ON and OFF, replace the K20 Engine Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for instrument cluster or ECM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The instrument cluster displays the engine coolant temperature, fuel level, vehicle speed and the engine speed based on the information from the engine control module (ECM). The ECM sends information via a High Speed CAN-Bus signal to the body control module (BCM). The BCM then sends the information via a Low Speed CAN-Bus signal to the instrument cluster to display the engine coolant temperature, fuel level, the engine speed, the vehicle speed and the distance travelled, either in kilometers or miles, based on the vehicle requirements.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify no DTC is set. If any DTC is set, diagnose this first.
Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that all gauges sweep from their low to high position. If any gauge does not sweep, replace the P16 Instrument Cluster.
Drive the vehicle, verify the gauge values matches the values on the scan tool. If the values do not match, replace the P16 Instrument Cluster.
If all gauges do sweep and display the correct value, and the odometer display counts up, replace the K20 Engine Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for instrument cluster or ECM replacement, setup and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The instrument cluster displays the travelled distance based on the information from the engine control module (ECM). The ECM converts the data from the vehicle speed sensor to a distance signal. The ECM sends the distance information via a High Speed CAN-Bus signal to the body control module (BCM). The BCM then sends the information via a Low Speed CAN-Bus signal to the instrument cluster to display the vehicle odometer and trip odometer. The instrument cluster detects the activation of the trip reset switch and a press and hold of the trip reset switch resets the trip odometer information to zero.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, verify the odometer trip reset switch resets the trip odometer display when the switch is pressed.

If the odometer trip reset switch does not reset the trip odometer, replace the P16 Instrument Cluster.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for instrument cluster replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ambient Air Temperature Sensor Signal	B0158 02	B0158 05	B0158 05
Low Reference		B0158 05	B0158 05

The instrument cluster monitors the ambient air temperature sensor with a low reference circuit and 5 V signal circuit. The instrument cluster monitors the voltage drop across the sensor, which is proportional to temperature. When the ambient air temperatures are cold, the resistance of the sensor is high and the voltage signals are high. When the ambient air temperatures are hot, the resistance of the sensors is low and the voltage signals are low. The instrument cluster converts the voltage value to a temperature value of Celsius or Fahrenheit that will be displayed by the display.

Schematic Reference

Connector End View Reference

Driver Information Center (DIC) Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
«Wiring Repairs»(/cadillac/srx/ii-2009-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Ambient Air Temperature parameter. The reading should be between -40°C (-40°F) to +88°C (+190°F) and change with air temperature changes.

Ignition OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor.
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal A and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the P16 Instrument Cluster. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Ambient Air Temperature parameter displays greater than 54°C (130°F). If less than the specified range, test the low reference circuit a short to voltage or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
Verify the accuracy of the B9 Ambient Air Temperature Sensor. Refer to «Ambient Air Temperature Sensor Resistance»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges__ambient-air-temperature-sensor-resistance) . If not within the specified range, replace the B9 Ambient Air Temperature Sensor.
If all circuits test normal, test the P16 Instrument Cluster.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Ambient Air Temperature Gauge Sensor Replacement»(/cadillac/srx/ii-2009-2012/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
«Control Module References»(/cadillac/srx/ii-2009-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for instrument cluster or display replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/cadillac/srx/ii-2009-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Aids

If the VIN mismatch is corrected the odometer will once again be displayed in the instrument cluster. If the vehicle is driven for a calibrated distance with a VIN mismatch, it will cause the instrument cluster odometer to enter into an error mode and lock itself. When this occurs the dashes will remain on the display even after correcting the VIN mismatch. The vehicle odometer status data display on the scan tool can be used to identify a locked odometer. The only way to unlock the instrument cluster (clear the dashes from the display) is to perform an SPS programming event. Failure to follow the diagnostic and programming procedures may result in either an improper odometer value or a module replacement.

Schematic Reference

Connector End View Reference

Description and Operation