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Home >> Chevrolet >> 2011 >> Equinox LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.4L - DTC P0300 Through P1682 >> DTC P0340 or P0365 >> Circuit/System Testing

Circuit/System Testing

  1. Engine idling, move the related harnesses/connectors of the B23 camshaft position sensor while monitoring the scan tool Camshaft Position Variance parameter. The Camshaft Position Variance parameter should not change when moving the harness/connectors.
    • If the above condition exists, repair the harness/connectors, as necessary.
  2. Ignition OFF, inspect the B23 camshaft position sensor for correct installation.
    • If the B23 camshaft position sensor is loose, inspect the sensor and the O-ring for damage and replace, as necessary.
  3. Ignition OFF, disconnect the harness connector at the B23 camshaft position sensor.
  4. Ignition OFF, all vehicle systems OFF, it may take 2 minutes for all systems to power down, test for less than 5 Ω between the appropriate low reference circuit terminal B 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 ECM.
  5. Ignition ON, test for 4.8-5.2 V between the appropriate 5 V reference circuit terminal A and ground.
    • If less than the specified range, test the 5 V reference circuit for an open/high resistance or short to ground. 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.
  6. Ignition ON, test for 4.8-5.2 V between the appropriate signal circuit terminal C and ground.
    • If less than the specified range, test the affected signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K20 ECM.
    • If greater than the specified range, test the affected signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  7. Ignition OFF, connect a 3 A fused jumper wire to the B23 camshaft position signal circuit terminal C.
  8. Ignition ON, momentarily touch the other end of the fused jumper wire to the battery negative post. The Camshaft Position Active Counter parameter on the scan tool should increment.
    • If the Camshaft Position Active Counter increments, replace the B23 camshaft position sensor.
    • If the Camshaft Position Active Counter does not increment, replace the K20 ECM.
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