Check Magnetic Switch Circuit

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY FOR MAGNETIC SWITCH
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition switch OFF.
4. Disconnect starter motor connector F28.
5. Check voltage between starter motor connector F28 terminal 1 (W/R) and ground using a digital circuit tester.
  - Ignition switch in: Battery voltage START.
OK or NG
- OK: GO TO 2.
- NG: Check the following.
  - 40A fusible link (letter m , located in fuse and fusible link box)
  - Ignition switch
    
    Fig 1: Checking Voltage Between Starter Motor Connector F28 Terminal 1 And Ground
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Starter relay [within the intelligent power distribution module engine room (IPDM E/R)]
  - Harness for open or short
CHECK VOLTAGE DROP ON MAGNETIC SWITCH CIRCUIT
1. Turn the ignition switch OFF.
2. Connect starter motor connector F28.
3. Check voltage between starter motor connector F28 terminal 1 (W/R) and battery positive terminal using a digital circuit tester.
  - Ignition switch in: Less than 1V START.
OK or NG
- OK: Magnetic switch circuit is OK. Further inspection is necessary. Refer to "WORK FLOW ".
- NG: Check harness between the battery and the magnetic switch for poor continuity.
Fig 2: Checking Voltage Between Starter Motor Connector F28 Terminal 1 And Battery Positive Terminal
Courtesy of NISSAN MOTOR CO., U.S.A.