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Secondary and Configurable Customer Control System: Diagnosis GMC Terrain I

Memory Modules ~1107 words

Diagnostic Code Index

DTCDescription
DTC B1405DTC B1405 03 Control Module Voltage Reference Output 2 Circuit Low Voltage DTC B1405 07 Control Module Voltage Reference Output 2 Circuit High Voltage
DTC B1529DTC B1529 03 Control Module Voltage Reference Output 5 Circuit Low Voltage DTC B1529 07 Control Module Voltage Reference Output 5 Circuit High Voltage
DTC B3622DTC B3622 07 Steering Wheel Controls Signal Circuit High Voltage

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
  2. Review Strategy Based Diagnosis for an overview of the diagnostic approach.
  3. Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Control Module Voltage Reference Output 21B1405 03
1. Open fuse

Conditions for Running the DTC

  1. Battery voltage is between 9-16 V.
  2. The ignition is ON.

Conditions for Setting the DTC

The BCM detects a low/high voltage on the control circuit.

Conditions for Clearing the DTC

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

Circuit/System Testing

  1. Ignition OFF, disconnect the X2 and the X1 harness connector at the K9 Body Control Module.
  2. Test for less than 5 ohms between the X2 harness connector ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for less than 5 ohms between the X1 harness connector ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, test for more than 11 V between the X2 harness connector terminal 1 and ground. If less than the specified value test the control circuit for an open/high resistance.
  5. If all circuits test normal, replace the K9 Body Control Module.
  1. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
  2. Review Strategy Based Diagnosis for an overview of the diagnostic approach.
  3. Diagnostic Procedure Instructions provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
12V ReferenceB1529 03, B1405 031B1529 07B1529 07
Steering Wheel Control Switch Signal11B3622 07
1. Steering Wheel Controls Inoperative

Electrical DTCs

  1. The system voltage is between 9-16 V.
  2. The ignition is ON.

B1529 03

  1. The BCM detects a short to ground in the 12 V reference circuit.
  2. The above condition is present for greater than 30 s.

B1529 07

  1. The BCM detects a short to voltage in the 12 V reference circuit.
  2. The above condition is present for greater than 30 seconds.

Action Taken When the DTC Sets

The BCM will ignore switch inputs.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction free ignition cycles have occurred.
  1. Ignition OFF, disconnect the S70R Steering Wheel Controls Switch - Right.
  2. Ignition ON, test for greater than 11 V between the voltage reference circuit terminal 1 and ground. If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  3. Test for greater than 11 V between the voltage reference circuit terminal 1 and the signal circuit terminal 2. If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  4. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
  5. Test for infinite resistance between the signal circuit terminal 2 at the S70R Steering Wheel Controls Switch - Right and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. If all circuits test normal, test or replace the S70R Steering Wheel Controls Switch - Right.
  1. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
  2. Review Strategy Based Diagnosis for an overview of the diagnostic approach.
  3. Diagnostic Procedure Instructions provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
12V ReferenceB1529 03, B1405 031B1529 07B1529 07
Steering Wheel Control Switch Signal11B3622 07
1. Steering Wheel Controls Inoperative
  1. Battery voltage is between 9-16 V.
  2. The ignition is ON.

The BCM detects a short to voltage in the steering wheel control switch signal circuit.

The BCM will ignore switch inputs.

  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction free ignition cycles have occurred.
  1. Ignition OFF, disconnect the S70R Steering Wheel Controls Switch - Right.
  2. Ignition ON, test for greater than 11 V between the voltage reference circuit terminal 1 and ground. If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  3. Test for greater than 11 V between the voltage reference circuit terminal 1 and the signal circuit terminal 2. If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  4. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
  5. Test for infinite resistance between the signal circuit terminal 2 at the S70R Steering Wheel Controls Switch - Right and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. If all circuits test normal, test or replace the S70R Steering Wheel Controls Switch - Right.

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the steering wheel controls. Refer to Checking Aftermarket Accessories .
  2. Inspect the easily accessible or visible system components, for obvious damage or conditions, which could cause the symptom.

Symptom List

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

Refer to Steering Wheel Controls Malfunction in order to diagnose the symptom.

  1. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
  2. Review Strategy Based Diagnosis for an overview of the diagnostic approach.
  3. Diagnostic Procedure Instructions provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
12V ReferenceB1529 03, B1405 031B1529 07B1529 07
Steering Wheel Control Switch Signal11B3622 07
1. Steering Wheel Controls Inoperative

Diagnostic Aids

  1. This diagnostic is for the audio steering wheel controls.
  2. Before diagnosis of the steering wheel controls, ensure the primary controls of the associated component are functioning properly.
  1. Ignition OFF, disconnect the S70R Steering Wheel Controls Switch - Right.
  2. Ignition ON, test for greater than 11 V between the voltage reference circuit terminal 1 and ground. If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  3. Test for greater than 11 V between the voltage reference circuit terminal 1 and the signal circuit terminal 2. If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  4. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
  5. Test for infinite resistance between the signal circuit terminal 2 at the S70R Steering Wheel Controls Switch - Right and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. If all circuits test normal, test or replace the S70R Steering Wheel Controls Switch - Right.

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