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 222 (KEYLESS/POWER DOOR LOCKS/SECURITY SYSTEM)SYMPTOM TROUBLESHOOTING INDEXPOWER DOOR LOCKS/KEYLESS
2008 Chevrolet HHR LT, 2.4 P, Automatic
Power Door Locks/Keyless
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Power Door Locks/Keyless
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- Check for B-CAN DTCs. If any B-CAN DTCs are indicated, refer to the B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ), and troubleshoot the indicated DTC(s) first.
- If the door lock system and the keyless operation do not work, troubleshoot the door locks first.NOTE: The system does not function when the ignition switch is ON (II).SYMPTOM CHART
Symptom Check Items The security system sounds randomly while the doors are locked. Tripped sensor history (see TRIPPED SENSOR HISTORY ). All the doors will not lock or unlock(1). - Poor ground (G501, G502) or an open in the ground wire
- Driver's door key cylinder switch test (see DOOR KEY CYLINDER SWITCH TEST ).
- Door switch test (check the door switch ON/OFF information with the HDS)
- Door lock switch test (check the door switch ON/OFF information with the HDS)
Driver's and left rear doors will not lock or unlock. - Poor ground (G501, G502) or an open in the ground wire
- Blown No. 27 (30 A) fuse in the under-dash fuse/relay box
- Blown No. 36 (15 A) and/or No. 50 (15A) fuse in the under-dash fuse/relay box
- MICU input test (see MICU INPUT TEST ).
Front passenger's and right rear doors will not lock or unlock. - Poor ground (G501, G502) or an open in the ground wire
- Blown No. 27 (30 A) fuse in the under-dash fuse/relay box
- Blown No. 35 (15 A) and or No. 49 (15 A) fuse in the under-dash fuse/relay box
- MICU input test (see MICU INPUT TEST ).
Keyless operation does not work (LOCK, UNLOCK, PANIC). Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ). Doors will not unlock with the transmitter, but will unlock with the door lock switch and the door key cylinder switch. - Symptom troubleshooting (see DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (OR LOCK) WITH THE DOOR LOCK SWITCH AND THE DOOR KEY CYLINDER SWITCH ).
- Door lock switch test (check the door switch ON/OFF information with the HDS)
Doors will not lock with the transmitter, but will lock with the door lock switch and the door key cylinder switch. - Symptom troubleshooting (see DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (OR LOCK) WITH THE DOOR LOCK SWITCH AND THE DOOR KEY CYLINDER SWITCH ).
- Door lock switch test (check the door switch ON/OFF information with the HDS)
Doors automatically relock 30 seconds after being unlocked with the transmitter even though a door has been opened. Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ). Only driver's door will unlock or door locks relock immediately after unlocking with the remote. Driver's door lock knob switch test (see DOOR LOCK KNOB SWITCH TEST ). Keyless operation will work even though the ignition key is in the ignition switch. Ignition key switch test (see IGNITION KEY SWITCH TEST ). The horn does not sound when the PANIC button on the transmitter is pressed. Symptom troubleshooting (see DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (OR LOCK) WITH THE DOOR LOCK SWITCH AND THE DOOR KEY CYLINDER SWITCH ). Security alarm system will not arm. Symptom troubleshooting (see SECURITY ALARM SYSTEM WILL NOT ARM ) (1) If only one door is not working properly, check that door's lock actuator first, then check the other items listed in this table.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.