CTS RWD V6-3.6L (2008)
*
Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Circuit/System Verification
Ignition ON, observe the cruise control indicator while applying the cruise on/off switch. The indicator should turn on and off accordingly with the
applied switch.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.
2. Connect a fused jumper wire between the voltage reference circuit terminal 1 and the cruise control indicator signal circuit terminal 9.
3. Engine ON, observe the Cruise On/Off Switch parameter.
‹› If the Cruise On/Off Switch parameter displays ON, replace the steering wheel controls switch - left.
‹› If the Cruise On/Off Switch parameter displays OFF, test the voltage signal circuit and the low reference circuit for an open/high resistance.
4. If all circuits test normal, replace the BCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
*
Steering Wheel Control Switch Assembly Replacement (See: Accessories and Optional Equipment/Sensors and Switches - Accessories and
Optional Equipment/Steering Mounted Controls Assembly/Service and Repair)
*
Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, setup, and programming
Cruise Control Malfunction
Cruise Control Malfunction
Diagnostic Instructions
*
Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
*
Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
*
Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure Instructions)
provides an overview of each diagnostic category.
Circuit/System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and
cancel switches via 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 (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Cruise Control Description and Operation (See: Description and Operation)
