LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2010 >> STS 3.6 V, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Controls And Fuel - 4.6L (LH2) - DTC P0335 To DTC P2544) >> DTC P0340, P0345, P0365, or P0390 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF and scan tool disconnected for 90 seconds, disconnect the appropriate camshaft position (CMP) sensor harness connector.
  2. Test for less than 5 ohms between the CMP 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 ECM.
  3. Ignition ON, test for 4.8-5.2 volts between the CMP 5-volt reference circuit terminal A and ground.
    • If less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for short to voltage. If the circuit tests normal, replace the ECM.
  4. Ignition ON, test for 4.8-5.2 volts between the CMP signal circuit terminal C 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 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 the CMP signal circuit terminal C, on the CMP sensor harness connector.
  6. Ignition ON, momentarily touch the other end of the fused jumper wire to ground. The CMP Active Counter parameter on the scan tool should increment by multiple counts with each individual grounding.
    • If the CMP active counter increments, replace the CMP sensor.
    • If the CMP active counter does not increment, replace the ECM.
scientia non olet · About LEMON Manuals