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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - AF40-6) >> Diagnostic Information and Procedures >> DTC P0973 or P0974: Shift Solenoid Valve 1 Control Circuit >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF and all vehicle systems OFF. Remove the K71 Transmission Control Module to disconnect the X2 harness connector. It may take up to 2 min for all vehicle systems to power down.
  2. Test for 11-15 Ω between the control circuit terminal 5 at the X2 harness connector and ground.
    • If not between 11-15 Ω 
    1. Disconnect the wiring harness from the Q32A Shift Solenoid Valve 1, refer to Automatic Transmission Wiring Harness Replacement 
    2. Test the wiring harness for infinite resistance between the control circuit terminal 5 and ground.
      • If less than infinite resistance, replace the wiring harness
      • If infinite resistance
    3. Test the wiring harness for less than 2 Ω in the control circuit terminal 5 and the harness connector at the Q32A Shift Solenoid Valve 1 end to end.
      • If 2 Ω or greater, replace the wiring harness
      • If less than 2 Ω
    4. Test the wiring harness for less than 1 V between the control circuit terminal 5 and ground.
      • If 1 V or greater, replace the wiring harness
      • If less than 1 V
    5. Test for less than 2 Ω in the ground circuit at the Q32A Shift Solenoid Valve 1 end to end.
      • If 2 Ω or greater, replace the wiring harness
      • If less than 2 Ω, replace the control valve body.
    • If between 11-15 Ω 
  3. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
    • If the DTC is set 

      Replace the K71 Transmission Control Module.

    • If the DTC is not set 
  4. All OK.
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