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Home >> Pontiac >> 2008 >> G6 Base, 2.4 B >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System >> Diagnostic Information and Procedures >> DTC C0545 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the power steering motor/module assembly.
  2. Test for less than 1 ohm between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Disconnect the X3 harness connector at the power steering motor/module assembly.
  4. Connect the EL-47564  Power Steering Control Module (PSCM) Test Harness.
  5. Test for less than 1 ohm between the low reference circuit terminal and ground at the test harness connector.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the power steering motor/module assembly.
  6. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal and ground at the test harness connector.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the power steering motor/module assembly.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the power steering motor/module assembly.
  7. Verify the scan tool torque sensor signal 1 parameter is greater than 4.75 volts.
    • If less than the specified range, replace the power steering motor/module assembly.
  8. Install a 3A fused jumper wire between the torque sensor signal 1 circuit terminal and the low reference circuit terminal at the test harness connector. Verify the scan tool steering position sensor signal 1 parameter is less than 0.25 volt.
    • If greater than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the power steering motor/module assembly.
  9. Verify the scan tool torque sensor signal 2 parameter is greater than 4.75 volts.
    • If less than the specified range, replace the power steering motor/module assembly.
  10. Install a 3A fused jumper wire between the torque sensor signal 2 circuit terminal and the low reference circuit terminal at the test harness connector. Verify the scan tool steering position sensor signal 2 parameter is less than 0.25 volt.
    • If greater than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the power steering motor/module assembly.
  11. If all circuits test normal, replace the torque/position sensor.
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