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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1345 (Power Take-Off System) >> Diagnostic Information and Procedures >> DTC P061C >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • Repair any ECM related DTCs or symptoms before using this diagnostic.
  • This DTC may be stored as a history DTC without affecting the operation of the ECM or PTOM. Do not replace the ECM or PTOM if this DTC is stored only as a history DTC and is not retrieved as a current DTC.
  1. Engine ON, press 1 on the PTO switch to engage PTO. The engine RPM should increase to the default engine speed within a few seconds. Press RES + to increase the engine speed and SET - to decrease the engine speed accordingly.
  2. Engine ON, clear codes in the PTOM and then engage PTO. Verify that DTC P061C does not reset as current in the PTOM.
    • If the specified code sets as current, replace the ECM. Do not replace the PTOM.
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