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Circuit/System Testing

NOTE:

It is recommended that Component Testing is performed before Circuit/System Testing when diagnosing the actuator because the module will default and does not supply voltage to the sensor when the DTC is set.

  1. Ignition OFF, disconnect the harness connector at the M72 Variable Power Steering Solenoid Valve.
  2. Ignition ON, verify that a test lamp illuminates between the control circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the test lamp between the control circuit terminal 1 and the control circuit terminal 2.
  4. Ignition ON, verify the test lamp briefly illuminates for approximately 1 second, then turns OFF.
    • If the test lamp is always ON, test the control circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K17 Electronic Brake Control Module (EBCM).
    • If the test lamp is always OFF, test the control circuit terminal 1 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module (EBCM).
  5. If all circuits test normal, test or replace the M72 Variable Power Steering Solenoid Valve.
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