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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 362 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0722 or P0723 >> Circuit/System Testing

Circuit/System Testing

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    NOTE:

    You must perform the Circuit/System Verification first.

  1. Ignition OFF, remove the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .
  2. Connect the DT-47825-10  jumper harnessbetween the vehicle wire harness electrical connector, and the control solenoid valve assembly electrical connector.
  3. Ignition ON, test for 8.3-9.3 volts between the ISS/OSS voltage circuit terminal B on the Q8 control solenoid valve assembly and ground at the transmission case.
    • If not within the specified range, replace the control solenoid valve assembly.
  4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test .
  5. Inspect the machined slots on the output shaft housing outer surface for damage or misalignment. Repair or replace as necessary.
  6. If all of the above test normal, replace the B14A/B14C ISS/OSS assembly.
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