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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P0335 >> Testing >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the crankshaft position sensor.
  2. Ignition OFF and all vehicle systems OFF, it may take 2 minutes for all Vehicle systems to power down. Test for less than 5 Ω between low reference circuit terminal 2 of the connector and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference 3 circuit terminal 3 of the connector and ground.
    • If less than the specified range, test the 5-volt reference 3 circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K20 engine control module.
    • If greater than the specified range, test the 5-volt reference 3 circuit for a short to voltage. If the circuit tests normal, replace the K20 engine control module.
  4. Test for 4.8-5.2 volts between the signal circuit terminal 1 of the connector and ground.
    • If less than the specified range, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K20 engine control module.
    • If greater than the specified range, test the signal circuit for an a short to voltage. If the circuit tests normal, replace the K20 engine control module.
    5. NOTE:

    Additional DTCs may set when performing this test.

  5. Ignition OFF, connect a 3A fused jumper wire between signal circuit terminal 1 of the connector and ground.
  6. Ignition ON, momentarily touch the other end of the fused jumper wire to ground repeatedly while monitoring the scan tool Crankshaft Position Sensor Active Counter parameter. The Crankshaft Position Active counter, should increment.
  7. If all circuits test normal, test or replace the B26 crankshaft position sensor.
    • If the Crankshaft Position Active counter does not increment, replace the K20 engine control module.
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