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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0550: PSP Sensor >> Diagnostic Procedure >> 6. Check PSP Sensor Input Signal Circuit For Open And Short
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6. Check PSP Sensor Input Signal Circuit For Open And Short

  1. Check harness continuity between ECM terminal 118 and PSP sensor terminal 2.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  2. Also check harness for short to ground and short to power.

OK or NG 

  1. OK: GO TO 8. CHECK PSP SENSOR .
  2. NG: GO TO 7.