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Home >> Chevrolet >> 2008 >> Optra LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (Diesel) >> Diagnostic Information and Procedures >> DTC P0335 or P0336 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the crankshaft position (CKP) sensor.
  2. Ignition ON, test for 2-3 volts between the high signal circuit terminal 1 and ground.
    • If less than the specified range, test the high signal circuit for an open/high resistance or for a short to ground. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  3. Ignition ON, test for 2-3 volts between the low signal circuit terminal 2 and ground.
    • If less than the specified range, test the low signal circuit for an open/high resistance or for a short to ground. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the low signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the CKP sensor.
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