B1529

DTC B1529

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category

DTC Descriptor
DTC B1529 00
- Control Module Voltage Reference Output 5 Circuit

Diagnostic Fault Information





Circuit/System Description

The body control module (BCM) provides battery voltage to the cruise control switch and the automatic transmission shift lever.

Conditions for Running the DTC

* The ignition is ON.
* The battery voltage is between 9 - 16 volts.


Conditions for Setting the DTC

* The BCM detects a short to ground or an open on the B+ circuit.
* The above condition is met for 5 seconds.

Action Taken When the DTC Sets

The BCM stores the DTC information into memory when the diagnostic runs and fails.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.
* A history DTC clears after 40 fault-free ignition cycles.

Reference Information

Schematic Reference
* Cruise Control Schematics (Electrical Diagrams)
* Body Control System Schematics (Electrical Diagrams)
* Automatic Transmission Controls Schematics (Electrical Diagrams)

Connector End View Reference

Component Connector End Views (Connector Views)

Description and Operation

Steering Wheel Controls Description and Operation (Steering Wheel Controls Description and Operation)

Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the X3 harness connector at the BCM.
2. Verify that a test lamp illuminates between the fuse B+ circuit terminal 3 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X3 harness connector at the BCM.
4. Disconnect the harness connector at the turn signal/multifunction switch.
5. Ignition ON, test for B+ between the B+ circuit terminal 6 and ground.

• If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

6. If all circuits test normal, test or replace the turn signal/multifunction switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the steering wheel switch assembly.
2. Test for 0.5-O.L. ohms between the scroll wheel terminals listed below, while rotating each steering wheel scroll wheel several times through its full range of motion.

* right steering wheel scroll wheel terminal 1 and terminal 2.
* left steering wheel scroll wheel terminal 3 and terminal 4.

• If not within the specified range or is erratic, replace the steering wheel switch.

3. Test the resistance between the signal terminal 6 and the low reference terminal 5 while depressing the appropriate steering wheel controls switch button listed below.

• If not the specified value, replace the steering wheel switch.





Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests).

Control Module References (Programming and Relearning) for BCM replacement, setup, and programming