Starting System (Circuit Diagnosis)

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Perform diagnosis under the condition that engine cannot start by the following procedure.

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 F28.
Shift transmission into park or neutral.

Check voltage between starter motor connector F28 terminal S and ground with the ignition in START.

(+)

(-)

Condition

Voltage

(Approx.)

Connector

Terminal

F28

Ground

Ignition switch in START position

Battery voltage

Is the inspection result normal?

YES

Magnetic switch circuit is OK. Further inspection is necessary. Refer to Work Flow (With 165-DSS-5000P) or Work Flow (Without 165-DSS-5000P) .

GO TO 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.

CHECK HARNESS CONTINUITY

Disconnect IPDM E/R connector F17.

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

Connector	Terminal	Connector	Terminal	Continuity
F28	S	F17	51	Yes

Check continuity between starter motor connector F28 terminal S and ground.

Connector	Terminal	--	Continuity
F28	S	Ground	No

Is the inspection result normal?

YES

Further inspection is necessary. Refer to Work Flow (With 165-DSS-5000P) or Work Flow (Without 165-DSS-5000P) .

Repair the harness.