Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Disconnect push-button ignition switch connector.

Check voltage between push-button ignition switch harness connector and ground.

(+)		(-)	Voltage
Push-button ignition switch
Connector	Terminal
M38	8	Ground	9 - 16 V

Is the inspection result normal?

YES

GO TO 4.

GO TO 2.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

Disconnect BCM connector and IPDM E/R connector.

Check continuity between push-button ignition switch harness connector and BCM harness connector.

Push-button ignition switch		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M38	8	M13	1	Existed

Check continuity between push-button ignition switch harness connector and ground.

Push-button ignition switch		Ground	Continuity
Connector	Terminal
M38	8		Not existed

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness.

REPLACE BCM
Replace BCM. Refer to Removal and Installation .

INSPECTION END

CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

Check continuity between push-button ignition switch harness connector and ground.

Push-button ignition switch		Ground	Continuity
Connector	Terminal
M38	4		Existed

Is the inspection result normal?

YES

GO TO 5.

Repair or replace harness.

CHECK PUSH-BUTTON IGNITION SWITCH
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 6.

NO

Replace push-button ignition switch. Refer to Removal and Installation .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

INSPECTION END