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 626 (POWER DOOR LOCK SYSTEM AND RELEASE SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B312ACOMPONENT TESTING
2008 Chevrolet HHR LT, 2.4 P, Automatic
Component Testing
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Component Testing
WARNING: This page is about a different car, the 2011 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the Door Lock relay.
- Test for 60-180 ohms between terminals 1 and 2.
- If not within the specified range, replace the relay.
- Test for infinite resistance between the following terminals:
- 1 and 3
- 1 and 5
- 2 and 3
- 2 and 5
- If not the specified value, replace the relay.
- Install a 20A fused jumper wire between relay terminal 1 and 12V. Install a jumper wire between relay terminal 2 and ground. Test for less than 2 ohms between terminals 3 and 5.
- If greater than the specified range, replace the relay.
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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.