Diagnosis Procedure

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.

CHECK TCM INPUT SIGNALS

Turn ignition switch OFF.
Start the engine.

Check voltage between TCM harness connector terminals.

+		-	Condition	Voltage
TCM
Connector	Terminal
F25	16	Ground	Selector lever: "N" position At idle	1.2 - 1.3 V

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

GO TO 2.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (PART 1)

Turn ignition switch OFF.
Disconnect TCM connector and CVT unit connector.

Check continuity between TCM harness connector terminals and CVT unit harness connector terminals.

TCM		CVT unit		Continuity
Connector	Terminal	Connector	Terminal
F25	11	F43	18	Existed
	16		14
	26		22

Is the inspection result normal?

YES

GO TO 3.

Repair or replace malfunctioning parts.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (PART 2)

Check continuity between TCM harness connector terminals and ground.

TCM		--	Continuity
Connector	Terminal
F25	16	Ground	Not existed
	26

Is the inspection result normal?

YES

GO TO 4.

Repair or replace malfunctioning parts.

CHECK TERMINAL CORD ASSEMBLY (PART 1)

Remove terminal cord assembly. Refer to Removal and Installation .

Check continuity between CVT unit harness connector terminals and control valve harness connector terminals.

CVT unit		Control valve		Continuity
Connector	Terminal	Connector	Terminal
F209	14	F207	12	Existed
	18		13
	22		11

Is the inspection result normal?

YES

GO TO 5.

Repair or replace malfunctioning parts.

CHECK TERMINAL CORD ASSEMBLY (PART 2)
Check damage of terminal cord assembly.

Is the inspection result normal?

YES

There is malfunction of secondary pressure sensor. Replace control valve assembly. Refer to Removal and Installation .

NO

Repair or replace malfunctioning parts.