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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 250 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0971) >> DTC P0736 >> Circuit/System Verification

Circuit/System Verification

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  1. Operate the vehicle to induce a shift from second to third gear while observing TFP Switch 1. Perform this action 2 times. The TFP Switch 1 should change states from Low to High.
    • If the TFP Switch does not change states and no other DTCs set, replace the control solenoid (w/body and TCM) valve assembly.
    • If any other DTCs set, diagnose that DTC first.
  2. Operate the vehicle to obtain sixth gear 2 times and then check for DTCs other than DTC P0736.
    • If any other DTCs set, diagnose that DTC first.
    • If no other DTC sets, continue on with diagnostics.
  3. Operate the vehicle by shifting from Park to Reverse, then while in reverse, operate the vehicle with the calculated throttle position greater than 8 percent for 5 seconds, perform this maneuver a minimum of 3 times.
    • If the DTC P0736 resets, go to Component Testing.
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