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Home >> Jaguar >> 2002 >> XK8 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P0444: EVAP Canister Purge Valve Circuit Open >> Diagnostic Test Procedure

Diagnostic Test Procedure

  1. Turn ignition off. Disconnect negative battery cable. Disconnect ECM connector EM80. Disconnect EVAP canister purge valve connector. Measure resistance between ECM connector EM80 terminal No. 1 and EVAP canister purge valve connector terminal No. 2. Is resistance greater than 5 ohms? If yes, repair high resistance between ECM connector EM80 terminal No. 1 and EVAP canister purge valve connector terminal No. 2. Clear DTC(s) and perform a full EVAP system monitor drive cycle. See DRIVE CYCLES . If no, go to next step.
  2. Reconnect negative battery cable. Measure resistance between EVAP canister purge valve connector terminal No. 2 and ground. Is resistance less than 10,000 ohms? If yes, repair short to ground. Clear DTC(s) and perform a full EVAP system monitor drive cycle. See DRIVE CYCLES . If no, install a new EVAP canister purge valve. Clear DTC(s) and perform a full EVAP system monitor drive cycle. See DRIVE CYCLES . Recheck DTC(s). If DTC resets, possible ECM failure.
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