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 Sunshade - Left
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 Control Module References for scan tool information
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the S70R Steering Wheel Controls Switch - Right, ignition ON.
2. Test for 11.8-12.2 V between the reference voltage circuit terminal 1 and ground.
• If less than 11.8 V
1. Ignition OFF, disconnect the harness connector at the K9 body control module.
2. Test for infinite resistance between the reference voltage circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the reference voltage circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 body control module.
• If greater than 12.2 V
1. Ignition OFF, disconnect the harness connector at the K9 body control module, ignition ON.
2. Test for less than 1 V between the reference voltage circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K9 body control module.
• If between 11.8-12.2 V
3. Test for 11.8-12.2 V between the reference voltage circuit terminal 1 and signal circuit terminal 2.
• If not between 11.8-12.2 V
1. Ignition OFF, disconnect the harness connector at the K9 body control module.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms replace the K9 body control module.
• If between 11.8-12.2 V
4. Ignition OFF, disconnect the harness connector at the K9 body control module.
5. Test for infinite resistance between the signal circuit terminal 2 and ground.
• If less than infinite resistance
Repair the short to ground on the circuit.
• If infinite resistance
6. Test or replace the S70R Steering Wheel Controls Switch - Right.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Control Module References for BCM replacement, setup, and programming