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Home >> GMC >> 2008 >> Acadia SLT, AWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P0563 >> Circuit/System Verification
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Circuit/System Verification

  1. Measure and record the voltage at the battery terminals with the engine OFF, and again with the engine running. Verify that the battery voltage is 11-16 volts with the engine OFF and with the engine running.
  2. Observe the scan tool Ignition 1 Signal parameter in the ECM data list. Verify that the scan tool displays a value that is within 2 volts of the battery voltage recorded in step  1.
    • If the scan tool parameter is not within the specified range, replace the ECM.
  3. Refer to Diagnostic Aids .
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