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HOMESERVICE MANUALSGMC2009CANYON 4D PICKUP, 2.9 9REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 13 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 3.7L - DTC P0324 TO DTC P1381)DTC P0335 OR P0336CIRCUIT/SYSTEM TESTING
2009 GMC Canyon 4D Pickup, 2.9 9

Circuit/System Testing

2009 GMC Canyon 4D Pickup, 2.9 9SECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the CKP sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal B and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
    3. IMPORTANT: 5K ohms or greater in the 5-volt reference circuit will cause this DTC to set.
  3. Ignition ON, engine OFF, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Ignition ON, engine OFF, test for 4.8-5.2 volts between the signal circuit terminal C and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  5. Ignition OFF, connect a fused jumper wire to signal circuit terminal C.
  6. Ignition ON, momentarily touch the other end of the fused jumper wire to the battery negative post repeatedly. The CKP Active Counter should increment.
    • If the CKP Active Counter increments, test or replace the CKP sensor.
    • If the CKP Active Counter does not increment, replace the ECM.
  7. Ignition OFF, inspect the CKP sensor for correct installation. Remove the CKP sensor from the engine. Inspect the sensor and the O-ring for damage.
    • If the sensor is loose, inspect the sensor and the O-ring for damage. Replace as necessary.
  8. Inspect the engine for the following conditions:
    • Engine oil for debris
    • Crankshaft reluctor wheel for damage
    • Timing chain, tensioner, and sprockets for wear or damage
    • If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.
  9. If all circuits and components test normal, test or replace the CKP sensor.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.