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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 506 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P182E or P1915 >> Circuit/System Testing

Circuit/System Testing

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NOTE:

You must perform Circuit/System Verification first.

  1. Ignition OFF, remove the automatic transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
  2. Disconnect the B15 Transmission Internal Mode Switch connector at the Q8 Control Solenoid Valve Assembly. Ignition ON.
  3. Verify the scan tool Engine Control Module Park/Neutral parameter displays In Gear.
    • If In Gear is not displayed 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the signal circuit and ground.
    • If less than infinite resistance, repair the short to ground on the circuit.
    • If infinite resistance, replace the K20 Engine Control Module.
    • If In Gear is displayed 
  4. Verify the scan tool parameter displays High for each signal circuit.
    • If High is not displayed for each signal circuit 

      Replace the Q8 control solenoid valve assembly.

    • If High is displayed for each signal circuit 
  5. Install a 3 A fused jumper wire between the ground circuit terminal A and each signal circuit listed below one at a time.
    • Signal A - terminal E to terminal A
    • Signal B - terminal D to terminal A
    • Signal C - terminal C to terminal A
    • Signal P - terminal B to terminal A
  6. Verify the scan tool Internal Mode Switch A/B/C/P parameters display Low when each circuit is grounded.
    • If Low is not displayed for each circuit 

      Replace the Q8 control solenoid valve assembly.

    • If Low is displayed 
  7. Replace the B15 Transmission Internal Mode Switch.
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