B3622
DTC B3622
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 B3622 07
- Steering Wheel Controls Signal Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the steering wheel control signal circuit voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected, the BCM will ignore the switch command.
Conditions for Running the DTC
* Battery voltage is between 9-16 V.
* The ignition is ON.
Conditions for Setting the DTC
The BCM detects a short to voltage in the steering wheel control switch signal circuit.
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 Fuel Pump and Level Sensor Assembly
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.
Component Testing
1. Ignition OFF, disconnect the X1 harness connector at the S70R Steering Wheel Controls Switch - Right.
2. Test the resistance between the signal terminal 2 and the reference voltage terminal 1 while pressing the appropriate steering wheel controls switch button listed below:
• If not the specified value
Replace the S70R Steering Wheel Controls Switch - Right.
• If the specified value
3. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for BCM replacement, programming and setup