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Home >> Jaguar >> 2000 >> XJ8 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P1104: Mass Airflow Sensor Ground Malfunction >> Diagnostic Test Procedure
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Diagnostic Test Procedure

  1. Disconnect the MAF sensor connector. Turn ignition on. Measure resistance between MAF sensor harness connector terminal No. 2 and ground. Is resistance greater than 5 ohms? If yes, go to next step. If no, install a new MAF sensor.
  2. Disconnect negative battery cable. Disconnect ECM connector EM83. Measure resistance between MAF sensor harness connector terminal No. 2 and ECM harness connector EM83 terminals No. 26 and 27. Is either resistance readings greater than 5 ohms? If yes, repair high resistance between MAF sensor harness connector terminal No. 2 and ECM harness connector EM83 terminals No. 26 and 27. If no, clear codes and retest system. If DTC resets, possible ECM failure.
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