Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Saturn >> 2008 >> Astra XE, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P000A To DTC P0365 >> DTC P0340 or P0365 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the appropriate camshaft position (CMP) sensor wire harness connector.
  2. Test for less than 5 ohms between the appropriate low reference circuit terminal 2 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 appropriate 5-volt reference circuit terminal 3 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 a short to voltage. If the circuit tests normal, replace the ECM.
  4. Ignition ON, test for 4.8-5.2 volts between the appropriate signal circuit terminal 1 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 ECM.
    • If greater than the specified range, test the affected signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  5. If all circuits test normal, replace the CMP sensor.
scientia non olet · About Mike's Workshop Manuals