Cruise Control Indicator Malfunction (Switch Indicator Malfunction)

Cruise Control Indicator Malfunction (Switch Indicator Malfunction)

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.

Diagnostic Fault Information






Circuit/System Description

The cruise control switch contains an LED that illuminates to indicate the cruise control system has been switched ON. Voltage is applied through the ON/OFF switch to the LED when the switch is pressed. The BCM provides the ground path for the LED through a dedicated control circuit. Pressing the switch again opens the switch and the lamp turns OFF.

Reference Information
Schematic Reference

Cruise Control Schematics Electrical Diagrams
Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation

* Cruise Control Description and Operation Description and Operation
* Indicator/Warning Message Description and Operation Indicator/Warning Message

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 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

Important: Refer to DTC B3794 B3794 before performing this diagnostic, if this code is set as current or history.


1. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.
2. Ignition ON, verify that a test lamp illuminates between the signal circuit terminal 9 and B+.

• If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

3. If all circuits test normal, test or replace the steering wheel controls switch - left.

Repair Instructions

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

* Steering Wheel Control Switch Assembly Replacement Service and Repair
* Control Module References Control Module References for BCM replacement, setup and programming