Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 516 (CRUISE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCRUISE CONTROL MALFUNCTIONCIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR LT, 2.4 P, Automatic
Circuit/System Testing
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2011 GMC Canyon and 2011 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X204 harness connector at the turn signal/multifunction switch.
- Ignition OFF, disconnect the run/crank relay, install a 20 A fused jumper wire between terminals 30 and 87 in the underhood fuse block.
- Verify that a test lamp illuminates between the B+ circuit terminal A8 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, test for less than 2.5-3.0k Ξ© between terminal B8 and ground.
- If less that the specified range, test the signal circuit for a short to ground. If the circuit tests normal replace the ECM.
- If greater that the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
- If all circuits test normal, replace the turn signal/multifunction switch.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.