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Home >> Jaguar >> 2000 >> XJR >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P1367: Ignition Monitor Group 1 >> Diagnostic Test Procedure
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Diagnostic Test Procedure

  1. Swap suspect coil for a known good coil. Clear the DTC and test the system for normal operation. Does the same DTC reoccur (same DTC indicates the same cylinder is misfiring)? If yes, go to next step. If no, install a new coil for coil that was swapped.
  2. Disconnect the appropriate ignition coil connector(s). Turn ignition on. Make sure the ignition coil relay is energized. Measure voltage between ignition coil harness connector(s) terminal No. 4 and ground. Is voltage less than 10.5 volts? If yes, repair the appropriate ignition coil supply voltage circuit. This circuit includes the ignition coil relay. If no, go to next step.
  3. Turn ignition off. Measure the resistance between ignition coil harness connector(s) terminal No. 1 and ground. Is resistance greater than 5 ohms? If yes, repair the high resistance between ignition coil harness connector(s) terminal No. 1 and ground. If no, go to next step.
  4. Disconnect negative battery cable. Disconnect the ECM connector EM84. Measure resistance between the appropriate ignition coil harness connector and ECM harness connector EM84 as follows:
    • Ignition coil No. 1-A harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 12.
    • Ignition coil No. 1-B harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 20.
    • Ignition coil No. 2-A harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 11.
    • Ignition coil No. 2-B harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 19.
    • Ignition coil No. 3-A harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 10.
    • Ignition coil No. 3-B harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 18.
    • Ignition coil No. 4-A harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 9.
    • Ignition coil No. 4-B harness connector terminal No. 3 and ECM harness connector EM84 terminal No. 17.

    Is resistance greater than 5 ohms? If yes, repair the high resistance between the appropriate ignition coil harness connector and ECM harness connector EM84. If no, go to next step.

  5. Reconnect the ECM connector EM84. Disconnect the ECM connector EM83. Measure the resistance between appropriate ignition coil harness connector and ECM harness connector EM83 as follows:
    • Ignition coil No. 1-A harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 10.
    • Ignition coil No. 2-B harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 10.
    • Ignition coil No. 3-B harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 10.
    • Ignition coil No. 4-A harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 10.

    Is resistance greater than 5 ohms? If yes, repair high resistance between appropriate ignition coil harness connector and ECM harness connector EM83. If no, go to next step.

  6. Reconnect negative battery cable. Measure the voltage between appropriate ignition coil and ground as follows:
    • Ignition coil No. 1-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 2-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 3-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 4-A harness connector terminal No. 2 and ground.

    Is voltage greater than 1 volt? If yes, repair short to voltage. If no, go to next step.

  7. Disconnect negative battery cable. Measure the resistance between appropriate ignition coil and ground as follows:
    • Ignition coil No. 1-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 2-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 3-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 4-A harness connector terminal No. 2 and ground.

    Is resistance less than 10,000 ohms? If yes, repair short to ground. If no, go to next step.

  8. Measure the resistance between appropriate ignition coil harness connector and ECM harness connector EM83 as follows:
    • Ignition coil No. 1-B harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 11.
    • Ignition coil No. 2-A harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 11.
    • Ignition coil No. 3-A harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 11.
    • Ignition coil No. 4-B harness connector terminal No. 2 and ECM harness connector EM83 terminal No. 11.

    Is resistance greater than 5 ohms? If yes, repair high resistance between appropriate ignition coil harness connector and ECM harness connector EM83. If no, go to next step.

  9. Reconnect negative battery cable. Measure the voltage between appropriate ignition coil and ground as follows:
    • Ignition coil No. 1-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 2-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 3-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 4-B harness connector terminal No. 2 and ground.

    Is voltage greater than 1 volt? If yes, repair short to voltage. If no, go to next step.

  10. Disconnect negative battery cable. Measure the resistance between appropriate ignition coil and ground as follows:
    • Ignition coil No. 1-B harness connector terminal No. 2 and ground.
    • Ignition coil No. 2-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 3-A harness connector terminal No. 2 and ground.
    • Ignition coil No. 4-B harness connector terminal No. 2 and ground.

    Is resistance less than 10,000 ohms? If yes, repair short to ground. If no, install a new ECM.

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