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 DIAGNOSISSTEERINGPOWER STEERING SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C0475 (TURBO)CIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR LT, 2.4 P, Automatic
Circuit/System Testing
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Testing
- Ignition OFF, disconnect the harness connector X1 at the PSCM.
- Ignition OFF, test for less than 1.0 ohm of resistance between the U phase circuit terminal 2 and the V phase circuit terminal 3 of the power steering motor.
- If greater than the specified range, test the U and V phase circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
- Ignition OFF, test for less than 1.0 ohm of resistance between the V phase circuit terminal 3 and the W phase circuit terminal 1 of the power steering motor.
- If greater than the specified range, test the V and W phase circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
- Ignition OFF, test for less than 1.0 ohm of resistance between the U phase circuit terminal 2 and the W phase circuit terminal 1 of the power steering motor.
- If greater than the specified range, test the U and W phase circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
- Ignition OFF, test for greater than 1.0 Mega-ohm of resistance between the U phase circuit terminal 2 and ground.
- If less than the specified range, test the U phase circuit for a short to ground. If circuits test normal, replace the power steering motor.
- Ignition OFF, test for greater than 1.0 Mega-ohm of resistance between the V phase circuit terminal 3 and ground.
- If less than the specified range, test the V phase circuit for a short to ground. If circuits test normal, replace the power steering motor.
- Ignition OFF, test for greater than 1.0 Mega-ohm of resistance between the W phase circuit terminal 1 and ground.
- If less than the specified range, test the W phase circuit for a short to ground. If circuits test normal, replace the power steering motor.
- If all circuits test normal, test or replace the PSCM.
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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.