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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T30 (MH9) Or 6T40 (MH8) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0722, P0723, P077C or P077D: Output Speed Sensor Circuit >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
    NOTE: You must perform the Circuit/System Verification  first.
  2. Connect the DT-48616-10  adapter harness between the vehicle harness connector and the Q8 Control Solenoid Valve Assembly connector.
  3. Ignition ON.
  4. Test for 11-13 V between the OSS sensor voltage circuit terminal B at the Q8 Control Solenoid Valve Assembly X4 connector and ground.
    • If not between 11-13 V 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If between 11-13 V 
  5. Verify the scan tool Transmission OSS parameter is between 745-825 RPM when performing the output shaft speed test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test .
    • If not between 745-825 RPM 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If between 745-825 RPM 
  6. Verify there is no damage to the park gear or misalignment between the B14A Transmission Output Shaft Speed Sensor and the park gear.
    • If the park gear is damaged or misaligned 

      Repair or replace as necessary.

    • If the park gear is not damaged or misaligned 
  7. Replace the B14A Transmission Output Shaft Speed Sensor.
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