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Home >> GMC >> 2019 >> Sierra 2500 HD Base, 2D Pickup, Gas >> Repair and Diagnosis >> Engine Mechanical >> Power Takeoff >> Power Take-Off >> Diagnostic Information and Procedures >> DTC P158F >> Circuit/System Testing

Circuit/System Testing

NOTE:

This diagnostic procedure will only diagnose factory installed components. It will not diagnose upfitter provided equipment. If the cover for the frame rail X191 Provisional connector, which includes a jumper wire, is removed DTC P251E may set.

  1. Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connectors at the K44 Power Take - Off Control Module and remove the frame rail X191 Provisional connector cover. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 1 V between the K44 Power Take - Off Control Module connector X1 terminal 25 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  3. Test for infinite resistance between the K44 Power Take - Off Control Module connector X1 terminal 25 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If less than 2 Ω 
  4. Test for less than 2 Ω end to end in the K44 Power Take - Off Control Module connector X1 terminal 25 and the frame rail X191 Provisional Connector terminal A.
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 2 Ω 
  5. Test or replace the K44 Power Take - Off Control Module.
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