Cruise Control Indicator Malfunction (Switch Indicator Malfunction)
Cruise Control Indicator Malfunction (Switch Indicator Malfunction)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* 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 dimming control circuit. Pressing the switch again opens the switch and the lamp turns OFF.
Diagnostic Aids
This diagnostic assumes the cruise control system is operating properly and no DTCs are set. If the cruise control system is malfunctioning, refer to Cruise Control Malfunction. Cruise Control Malfunction
If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions
Circuit/System Verification
Engine ON, press and release the cruise control ON/OFF switch while observing the Cruise On/Off Switch parameter in the ECM data list with a scan tool. The parameter should change and the indicator lamp should turn ON or OFF accordingly each time the switch is actuated.
Circuit/System Testing
Caution: Refer to Restraint System Service Precautions.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling.
1. Ignition ON, with a scan tool observe the Cruise On/Off Switch parameter. Verify the parameter changes each time the switch is actuated
• If the parameter reads ON at all times replace the cruise control switch.
2. Ignition OFF, remove the inflatable restraint steering wheel module.
3. Disconnect the harness connector at the cruise control switch assembly.
4. Ignition ON, test for 0 volts between the cruise control harness connector terminal 9 and ground.
• If voltage is present, test the circuit for a short to voltage.
5. Ignition OFF, disconnect the X3 connector at the BCM.
6. Test for less than 1.0 ohm between the cruise control harness connector terminal 9 and the BCM connector X3 terminal 22.
• If greater than the specified value, test the circuit for an open or high resistance.
7. Test for infinite resistance between the cruise control harness connector terminal 9 and ground.
• If resistance is measured, test the circuit for a short to ground.
8. If all circuits test normal, test the component. If the circuits and component tests are normal, replace the BCM.
Component Testing
Caution: Refer to Restraint System Service Precautions.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling.
Important: The cruise control switch must be ON in order to properly test the switch indicator.
1. Ignition OFF, remove the inflatable restraint steering wheel module.
2. Remove the steering wheel cruise control switch.
3. Turn the cruise control switch ON. Connect a DMM positive lead to terminal 1 and the negative lead to terminal 9 of the cruise control switch and measure the resistance. Verify the meter reading indicates continuity.
• If the reading indicates an open circuit, replace the cruise control switch assembly.
4. Connect the DMM positive lead to terminal 9 and the negative lead to terminal 1 of the cruise control switch and measure the resistance. Verify the meter reading indicates an open circuit.
• If the reading is not as specified, replace the cruise control switch assembly.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Steering Wheel Control Switch Assembly Replacement