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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1220 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P0A8E >> Circuit/System Testing
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Circuit/System Testing

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. Turn the Ignition to ON.
  2. Connect a DMM to the 14 volt battery.
  3. Use the APM Low Voltage Control to turn on the APM 14 volt system. Vary the voltage setpoint with the scan tool ensuring that the DMM tracks the commanded voltage.
    • If the Low Voltage Control fails, replace the APM.
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