DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan NV3500 HD and 2018 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TCM POWER SOURCE (PART 1)

Turn ignition switch OFF.
Disconnect A/T assembly connector.

Check voltage between A/T assembly harness connector terminal and ground.

+		-	Condition	Voltage (Approx.)
A/T assembly
Connector	Terminal
F55	2	Ground	Always	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 2 .

GO TO STEP 6 .

CHECK TCM POWER SOURCE (PART 2)

Check voltage between A/T assembly harness connector terminals and ground.

+		-	Condition	Voltage (Approx.)
A/T assembly
Connector	Terminal
F55	1	Ground	Turn ignition switch ON	Battery voltage
			Turn ignition switch OFF	0 V
	6		Turn ignition switch ON	Battery voltage
			Turn ignition switch OFF	0 V

Is the inspection result normal?

YES

GO TO STEP 3 .

GO TO STEP 7 .

CHECK TCM GROUND CIRCUIT

Check continuity between A/T assembly harness connector terminals and ground.

A/T assembly		-	Continuity
Connector	Terminal
F55	5	Ground	Existed
	10

Is the inspection result normal?

YES

GO TO STEP 4 .

Repair or replace damaged parts.

CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Is the inspection result normal?

YES

Replace the control valve & TCM. Refer to Exploded View .

NO

Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM (PART 1)
Check the following.
- Open circuit or short circuit in harness between battery positive terminal and A/T assembly harness connector terminal 2.
- Battery
- 10 A fuse (No. 30)
Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Repair or replace damaged parts.

CHECK HARNESS BETWEEN TCM RELAY E/R AND A/T ASSEMBLY

Turn ignition switch OFF.
Disconnect TCM relay connector.

Check continuity between TCM relay harness connector terminal and A/T assembly harness connector terminals.

TCM relay		A/T assembly		Continuity
Connector	Terminal	Connector	Terminal
M88	5	F55	1	Existed
			6

Is the inspection result normal?

YES

GO TO STEP 7 .

Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM (PART 2)
Check the following.
- Open circuit or short circuit in harness between battery and TCM relay.
- Short circuit in harness between TCM relay harness connector terminal 5 and A/T assembly harness connector terminal 1, and 6.
- 10 A fuse (No. 30)
- TCM relay
Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Repair or replace damaged parts.