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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 403 (Engine Control System) >> DTC P1220: Fuel Pump Control Module (FPCM) >> Diagnostic Procedure >> 7. Check FPCM Input Signal Circuit For Open And Short
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7. Check FPCM Input Signal 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. Disconnect ECM harness connector.
  2. Check harness continuity between ECM terminal 116 and FPCM terminal 4. Refer to WIRING DIAGRAM .

    Continuity should exist. 

  3. Check harness continuity between ECM terminal 116 and ground. Refer to WIRING DIAGRAM .

    Continuity should not exist. 

  4. Also check harness for short to power.

OK or NG 

  1. OK: GO TO 9. CHECK FPCM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT .
  2. NG: GO TO 8.
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