S Connector Circuit

S CONNECTOR CIRCUIT

Description

Terminal "S" is the power supply for the starter motor magnetic switch. Terminal S is supplied with power when the ignition switch is turned to the START position while the selector lever is in the P (Park) or N (Neutral) position.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Electrical Diagrams.

CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1.Remove fuel pump fuse.
2.Crank or start the engine (where possible) until the fuel pressure is released.

1. CHECK STARTER MOTOR MAGNETIC SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect starter motor connector F28.
3.Shift transmission into park or neutral.
4.Check voltage between starter motor connector F28 terminal S and ground with the ignition in START.





Is the inspection result normal?
YES- Magnetic switch circuit is OK. Further inspection is necessary. Refer to "Work Flow (With GR8-1200 NI)" Work Flow (With GR8-1200 NI) or "Work Flow (Without GR8-1200 NI)" Work Flow (Without GR8-1200 NI).
NO- GO TO 2

2. CHECK CONNECTOR

1.Turn ignition switch OFF.
2.Check the IPDM E/R connector F17 and starter motor connector F28 for damage, bent pins and loose connections.
Is the inspection result normal?
YES- GO TO 3
NO- Repair the terminal and connector.

3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect IPDM E/R connector F17 and starter motor connector F28.
2.Check continuity between starter motor connector F28 terminal S and IPDM E/R connector F17 terminal
51.





3.Check continuity between starter motor connector F28 terminal 2 and ground.





Is the inspection result normal?
YES- Further inspection necessary. Refer to "Work Flow (With GR8-1200 NI)" Work Flow (With GR8-1200 NI) or "Work Flow (Without GR8-1200 NI)" Work Flow (Without GR8-1200 NI).
NO- Repair the harness.
Revision: March 20122013 Infiniti JX