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Home >> Pontiac >> 2006 >> G6 Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.4L - DTC P0010 To DTC P0341 >> DTC P0340, P0341, P0365 or P0366 >> Circuit/System Testing

Circuit/System Testing

  1. With the ignition OFF, inspect the engine wiring harness carrying the CMP sensor circuits for the following conditions:
    • Close routing of secondary ignition wires
    • Close routing of aftermarket electrical equipment
    • Close to solenoids, motors and relays
  2. Ignition ON, test for 4.8-5.2 volts between both 5-volt reference circuits and the negative terminal of the battery.
    • If more than 5.2 volts, test the affected 5-volt reference circuit for a short to voltage or faulty ECM.
    • If less than 4.8 volts, test the affected 5-volt reference circuit for an open or short to ground or a faulty ECM.
  3. Ignition ON, test for 4.8-5.2 volts between both signal circuits and the negative terminal of the battery.
    • If more than 5.2 volts, test the affected signal circuit for a short to voltage or faulty ECM.
    • If less than 4.8 volts, test the affected signal circuit for an open or short to ground or a faulty ECM.
  4. With the ignition ON, the engine OFF and the sensor disconnected, install a test lamp between the signal circuit and the negative terminal of the battery.
    • If the test lamp does illuminate, test the signal circuit of the affected sensor for a short to voltage or a faulty ECM.
  5. With the ignition ON, the engine OFF and the sensor disconnected, install a test lamp between the low reference circuit and battery voltage.
    • If the test lamp does not illuminate, test the low reference circuit of the affected sensor for an open, high resistance or a faulty ECM.
  6. With the ignition ON, engine OFF and a jumper wire connected to ground, probe the CMP sensor signal circuit repeatedly. The CMP active counter parameter should increment.
    • If the CMP active counter does not increment, test for a faulty ECM.
  7. Inspect the camshaft reluctor wheel for damage.
    • If damage is found, replace as necessary.
  8. If all circuits test normal, replace the CMP sensor.
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