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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 P2534 or P2535 >> Circuit/System Verification

Circuit/System Verification

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  1. Engine ON, accessories OFF, measure and record the battery voltage with a DMM. The battery voltage should be between 12.6-15 volts.
    • If between 12.6-15 volts 
  2. Observe the scan tool TCM Ignition Voltage parameter. The reading should be between 12.6-15 volts.
    • If not between 12.6-15 volts 

      Refer to Circuit/System Testing below.

    • If between 12.6-15 volts 
  3. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections .
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