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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0452: EVAP Control System Pressure Sensor >> Diagnostic Procedure >> 9. Check EVAP Control System Pressure Sensor Shield Circuit For Open And Short
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9. Check EVAP Control System Pressure Sensor Shield Circuit For Open And Short

  1. Disconnect harness connectors B401, B251.
  2. Check the following continuity between harness connector B251 terminal 5 and ground.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  3. Also check harness for short to power.
  4. Then reconnect harness connectors B401, B251.

OK or NG 

  1. OK: GO TO 11. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR .
  2. NG: GO TO 10.