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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the steering wheel position sensor (SWPS).
  2. Ignition OFF for 60 seconds, test for less than 10 Ω between the low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Disconnect the harness connector at the EBCM.
  4. Test for less than 1 V between the 5 V reference circuit terminal 1 and ground.
    • If greater than the specified range, test the 5 V reference circuit for a short to voltage.
  5. Ignition OFF, test for infinite resistance between the 5 V reference circuit terminal 1 and ground.
    • If less than the specified value, test the 5 V reference circuit for a short to ground.
  6. Ignition OFF, test for less than 2 Ω between the 5 V reference circuit terminal 1 at the steering wheel position sensor harness connector and terminal 25 at the EBCM harness connector.
    • If greater than the specified range, test the 5 V reference circuit for an open/high resistance.
  7. Ignition ON, test for less than 1 V between the signal circuits listed below and ground.
    • Steering Wheel Position Signal A terminal 5
    • Steering Wheel Position Signal B terminal 6
    • If greater than the specified range, test the signal circuit for a short to voltage.
  8. Ignition OFF, test for infinite resistance between the signal circuit listed below and ground.
    • Signal A terminal 5
    • Signal B terminal 6
    • If less than the specified value, test the signal circuit for a short to ground.
  9. Test for less than 2 Ω between the signal circuit terminals listed below.
    • Signal A terminal 5 at the steering wheel position sensor harness connector and terminal 39 at the EBCM harness connector.
    • Signal B terminal 6 at the steering wheel position sensor harness connector and terminal 10 at the EBCM harness connector.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  10. If all circuits test normal, replace the steering wheel position sensor. If the DTC resets replace the EBCM.
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