B1295

DTC B1295

Diagnostic Instructions

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

DTC Descriptor
DTC B1295 07
- Steering Wheel Controls Group 2 Signal Circuit High Voltage

Diagnostic Fault Information





Circuit/System Description

The body control module (BCM) supplies voltage to the steering wheel control switches and monitors the return signal. Each switch state is associated to a set resistance value and when pressed a specific voltage drop occurs across the resistor unique to the switch. The BCM identifies the switch selection and activates the feature.

Conditions for Running the DTC

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

Conditions for Setting the DTC

* The BCM detects a short to voltage on the signal circuit.
* The above condition is present for greater than 30 s.

Action Taken When the DTC Sets

The BCM will ignore switch inputs.

Conditions for Clearing the DTC

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

Reference Information
Schematic Reference

Steering Wheel Secondary/Configurable Control Schematics (Steering Wheel Secondary/Configurable Control Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Steering Wheel Controls Description and Operation (Steering Wheel Controls)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
2. Test for less than 10 ohm between the signal circuit terminal 2 and ground.

• If greater than the specified value, test the signal circuits for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

3. Ignition ON, test for greater than 11 V between the 12 V reference circuit terminal 1 and ground.

• If less than the specified value, test the 12 V reference circuit for a short to ground 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 9 X3 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 S70L Steering Wheel Controls Switch - Left.

Component Testing

Left Steering Wheel Switch Test
1. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
2. Turn the cruise control switch in the ON position.
3. Test the resistance between the terminals 1 and 2.

• If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the S70L Steering Wheel Controls Switch - Left.





Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Radio Control Switch Replacement - Steering Wheel (Radio Control Switch Replacement - Steering Wheel)
* Control Module References (Programming and Relearning)for BCM replacement, setup, and programming