Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

Turn ignition switch OFF.
Disconnect transmission range switch harness connector.
Turn ignition switch ON.

Check the voltage between transmission range switch harness connector and ground.

+		-	Voltage
Transmission range switch
Connector	Terminal
F29	7	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 3 .

GO TO STEP 2 .

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect IPDM E/R harness connector.

Check the continuity between transmission range switch harness connector and IPDM E/R harness connector.

Transmission range switch		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F29	7	F24	63	Existed

Also check harness for short to ground.

Is the inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit.

Repair or replace error-detected parts.

CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between transmission range switch harness connector and ECM harness connector.

Transmission range switch		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F29	10	F79	83	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO STEP 4 .

Repair or replace error-detected parts.

CHECK TRANSMISSION RANGE SWITCH

Check the transmission range switch. Refer to COMPONENT INSPECTION .

Is the inspection result normal?

YES

Check intermittent incident. Refer to INTERMITTENT INCIDENT .

NO

There is malfunction of transmission range switch. Replace transaxle assembly. Refer to REMOVAL AND INSTALLATION .