FixVault

4. Check PSP Sensor Ground Circuit For Open And Short

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between PSP sensor terminal 3 and ECM terminal 89.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  4. Also check harness for short to power.

OK or NG 

  1. OK: GO TO 6. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT .
  2. NG: GO TO 5.