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Home >> GMC >> 2011 >> Terrain SLE, 2.4 C, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.4L - DTC P0300 Through P1682 >> DTC P0335 or P0336 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the B26 crankshaft position sensor.
  2. Ignition OFF, all vehicle systems OFF, it may take up to 2 minutes for all systems to power down, test for less than 5 Ω between the low reference circuit terminal 2 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 K20 ECM.
    3. NOTE: 5K Ω or greater in the 5 V reference circuit will cause this DTC to set.
  3. Ignition ON, engine OFF, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
    • If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
    • If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Ignition ON, engine OFF, test for 4.8-5.2 V between the signal circuit terminal 3 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 K20 ECM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  5. Ignition OFF, connect a 3 A fused jumper wire to signal circuit terminal 3.
  6. Ignition ON, momentarily touch the other end of the fused jumper wire to the battery negative post repeatedly. The Crankshaft Position Active Counter should increment.
    • If the Crankshaft Position Active Counter increments, test or replace the B26 crankshaft position sensor.
    • If the Crankshaft Position Active Counter does not increment, replace the K20 ECM.
  7. Ignition OFF, inspect the B26 crankshaft position sensor for correct installation. Remove the B26 crankshaft position 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 B26 crankshaft position sensor.
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