Cruise Control Malfunction (4-Spoke Steering Wheel)
Cruise Control Malfunction (4-Spoke Steering Wheel)
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 provide an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data message to the engine control module (ECM), indicating the status of the cruise control switches.
Reference Information
Schematic Reference
* Cruise Control Schematics Electrical Diagrams
* Body Control System Schematics [1][2]Body Control Systems
* 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
Cruise Control Description and Operation Description and Operation
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 Verification
Engine ON, while rotating the steering wheel to both steering stops, observe the scan tool Cruise Control Switch parameter while pressing each of the cruise control switches. The parameter should toggle between On, Off, Resume and Set as the applicable switch is pressed.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.
2. Ignition OFF, test for less than 10 ohms between the ground circuit terminal 1 (non UK3) or 3 (UK3) and ground.
• If greater than the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, test for B+ between the B+ circuit terminal 3 (non UK3) or 5 (UK3) and ground.
• If less than the specified value, test the voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
4. Ignition OFF, connect the harness connector at the steering wheel controls switch - left.
5. Disconnect the harness connector at the steering wheel controls switch - right.
6. Ignition ON and cruise control switch ON, test for B+ between the B+ circuit terminal 3 (non UK3) or 6 (UK3) and ground.
• If less than the specified value, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the steering wheel controls switch - left.
7. Test for B+ between the B+ circuit terminal 3 (non UK3) or 6 (UK3) and the signal circuit terminal 4 (non UK3) or 7 (UK3).
• 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 BCM.
8. Ignition OFF, disconnect the X2 harness connector at the BCM.
9. Test for infinite resistance between the signal circuit terminal 61 and ground.
• If less than the specified value, test the signal circuit for a short to ground.
10. If all circuits test normal, test or replace the steering wheel control switch - right.
Component Testing
Steering Wheel Controls - Left
1. Disconnect the harness connector at the steering wheel control switch - left.
2. Cruise control switch ON, measure the resistance between terminals 5 and 6 (UK3) or 3 and 4 (non UK3) while individually activation and holding each cruise control function switch and compare the resistance reading to the values in the table below.
• If not within the specified resistance range, replace the steering wheel control switch - left.
Steering Wheel Controls - Right
1. Disconnect the harness connector at the steering wheel control switch - right.
2. Cruise control switch ON, measure the resistance between terminals 6 and 7 (UK3) or 3 and 4 (non UK3) while individually activation and holding each cruise control function switch and compare the resistance reading to the values in the table below.
• If not within the specified resistance range, replace the steering wheel control switch - right.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Steering Wheel Control Switch Assembly Replacement (Cruise Control and Radio Switch) Service and Repair
* Control Module References Programming and Relearning for BCM or ECM replacement, setup, and programming