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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Hybrid Energy Storage System) >> Diagnostic Information and Procedures >> DTC P0A7E or P1ABE >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, with a scan tool, monitor the hybrid battery temperature parameters. The hybrid battery temperature should be between -39 and +65°C (-40 and +149°F).
  2. Use the special function test on the scan tool to test the drive motor generator battery vent fan operation in all speed ranges. You should be able to here the vent fan relay softly click when turned on and off. You should notice a change in fan speed as you increase the commanded speed. There is approximately a 5 second delay from when the battery vent fan speed is commanded before the vent fan speed actually changes.
  3. Operate the vehicle within the Conditions for Running the DTCs. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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