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Home › GMC › 2008 › Yukon Base, 4.8 C › Repair and Diagnosis › External Pages › Different variant/trim › Section 4 (Hybrid Engine Control System) › Diagnostic Information and Procedures › DTC P0563 › Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Engine ON, the scan tool Control Module Voltage parameter should display less than 14.5 volts.
    • If the voltage is not less than the specified value, test the Ignition Voltage circuit for a short to a voltage source greater than the specified value.
    • If the voltage is within the specified range, replace the PIM.
  2. Inspect for an external condition that may have caused a high -12 V circuit condition such as a battery charger.
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