H2 V8-6.2L (2008)
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 (See: Cruise Control Malfunction) .
If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) .
Reference Information
Schematic Reference
Cruise Control Schematics (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Component Connector End Views)
Electrical Information Reference
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Circuit Testing (See: Diagrams/Diagnostic Aids/General Electrical Diagnostic Procedures/Circuit Testing/Circuit Testing)
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Connector Repairs (See: Diagrams/Diagnostic Aids/General Electrical Diagnostic Procedures/Connector Repairs/Connector Repairs)
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Testing for Intermittent Conditions and Poor Connections (See: Diagrams/Diagnostic Aids/General Electrical Diagnostic Procedures/Circuit
Testing/Testing For Intermittent and Poor Connections)
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Wiring Repairs (See: Diagrams/Diagnostic Aids/General Electrical Diagnostic Procedures/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Programming and Relearning (See: Testing and Inspection/Programming and Relearning) for scan tool information
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 SIR Caution (See: Restraint Systems/Service Precautions/Technician Safety Information/SIR Caution) .
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling (See: Body and
Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Air Bag(s) Arming and Disarming/Service and Repair) .
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. Refer to Inflatable Restraint Steering Wheel Module Replacement (See:
Restraint Systems/Air Bag Systems/Air Bag/Service and Repair/Removal and Replacement/Inflatable Restraint Steering Wheel Module
Replacement) .
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.
