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Home >> Saturn >> 2008 >> Astra XE, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P000A To DTC P0365 >> DTC P0335 or P0336 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the CKP sensor.
  2. Ignition OFF, test for less than 1 ohm 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 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 1 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 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 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 3.
  6. Ignition ON, momentarily touch the other end of the fused jumper wire to the battery negative post repeatedly. The engine RPM parameter on the scan tool should change.
    • If the engine RPM parameter changes, test or replace the CKP sensor.
    • If the engine RPM parameter does not change, replace the ECM.
  7. Ignition OFF, inspect the CKP sensor for correct installation. Remove the CKP sensor from the engine. Inspect the sensor for damage.
    • If the sensor is loose, inspect the sensor and the sensor bracket for damage. Replace as necessary.
  8. Inspect the engine for the following conditions:
    • Engine oil for debris
      • NOTE: Do not allow the crankshaft encoder wheel to come into contact with external magnetic fields or sharp metal objects. Do not drop the crankshaft encoder wheel. Do not damage the rubberized encoder track. Failure to follow these precautions may cause damage to the component.
    • Crankshaft encoder wheel for damage
    • Timing belt, 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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