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 C0545 (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 X3 at the PSCM.
- Ignition OFF, test for 2-20 ohms between the exciting circuit terminal 4 and the exciting ground circuit terminal 2 of the torque sensor.
- If not within the specified range, test the exciting and exciting ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.
- Ignition OFF, test for 100-500 ohms between the input SIN circuit terminal 8 and the torque sensor ground circuit terminal 1 of the torque sensor.
- If not within the specified range, test the input SIN and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.
- Ignition OFF, test for 300-1000 ohms between the input COS circuit terminal 7 and the torque sensor ground circuit terminal 1 of the torque sensor.
- If not within the specified range, test the input COS and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.
- Ignition OFF, test for 50-200 ohms between the output SIN circuit terminal 6 and the torque sensor ground circuit terminal 1 of the torque sensor.
- If not within the specified range, test the output SIN and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.
- Ignition OFF, test for 200-800 ohms between the output COS circuit terminal 5 and the torque sensor ground circuit terminal 1 of the torque sensor.
- If not within the specified range, test the output COS and the torque sensor ground circuits for a short or an open/high resistance. If circuits test normal, replace the steering column.
- Ignition OFF, test for greater than 1.0 Mega-ohms between the exciting ground circuit terminal 2 and the torque sensor ground terminal 1.
- If less than the specified range, test the exciting ground circuit for a short to the torque sensor ground circuit. If circuits test normal, replace the steering column.
- Ignition OFF, test for greater than 1.0 Mega-ohm of resistance between the torque sensor ground circuit terminal 1 and ground.
- If less than the specified range, test the torque sensor ground circuit for a short to ground. If circuits test normal, replace the steering column.
- Ignition OFF, test for greater than 1.0 Mega-ohms between the exciting ground circuit terminal 2 and ground.
- If less than the specified range, test the exciting ground circuit for a short to ground. If circuits test normal, replace the steering column.
- 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.