Diagnosis Procedure - VQ40DE
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - VQ40DE ".
CAUTION:
Before testing, perform the following procedure to ensure the engine cannot start.
- Remove fuel pump fuse.
- Crank or start the engine (where possible) until the fuel pressure is released.
- CHECK STARTER MOTOR MAGNETIC SWITCH CIRCUIT
- Turn ignition switch OFF.
- Disconnect starter motor connector E207.
- Shift transmission into park or neutral.
- Check voltage between starter motor harness connector E207 terminal 1 and ground with the ignition in START.
(+) (-) Condition Voltage Connector Terminal E207 1 Ground While cranking the engine Battery voltage Courtesy of NISSAN NORTH AMERICA, INC.
Is battery voltage present?
YES: Magnetic switch circuit is OK. Further inspection necessary. Refer to "WORK FLOW ".
NO: GO TO 2
- CHECK CONNECTOR
- Turn ignition switch OFF.
- Check the IPDM E/R harness connector E120 and starter motor harness connector E207 for damage, bent pins and loose connections.
Is the inspection result normal?
YES: GO TO 3
NO: Repair the terminal and connector.
- CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
- Disconnect IPDM E/R connector E120.
- Check continuity between starter motor harness connector E207 (A) terminal 1 and IPDM E/R harness connector E120 (B) terminal 19.
Starter motor IPDM E/R Continuity Connector Terminal Connector Terminal E207 (A) 1 E120 (B) 19 Yes - Check continuity between starter motor harness connector E207 (A) terminal 1 and ground.Fig 2: Checking Continuity Between Starter Motor Harness Connector E207 Terminal 1 And IPDM E/R Harness Connector E120 Terminal 19
Courtesy of NISSAN NORTH AMERICA, INC.
Starter motor - Continuity Connector Terminal E207 (A) 1 Ground No Are the continuity test results as specified?
YES: Further inspection necessary. Refer to "WORK FLOW ".
NO: Repair the harness.