DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL

With CONSULT

Check key switch KEY ON SW in DATA MONITOR mode with CONSULT. Refer to CONSULT Function (BCM - DOOR LOCK) .

When key is inserted to ignition key cylinder:

KEY ON SW

: ON

When key is removed from ignition key cylinder:

KEY ON SW

: OFF

Without CONSULT

Check voltage between BCM connector M18 terminal 37 and ground.

Connector	Terminals		Condition	Voltage (V) (approx.)
	(+)	(-)
M18	37	Ground	Key is inserted.	Battery voltage
			Key is removed.	0

Is the inspection result normal?

YES

Key switch (insert) circuit is OK.

GO TO 2.

CHECK KEY SWITCH (INSERT)

Turn ignition switch OFF.
Disconnect key switch connector.
Check continuity between key switch terminals 2 and 1.

Terminals	Condition	Continuity
2 - 1	Key is inserted.	Yes
2 - 1	Key is removed.	No

Is the inspection result normal?

YES

GO TO 3.

Replace key switch and key lock solenoid.

CHECK KEY SWITCH CIRCUIT

Disconnect BCM.

Check continuity between the BCM harness connector M18 terminal 37 and key switch harness connector M27 terminal 1.

37 - 1

: Continuity should exist

Check continuity between BCM harness connector M18 terminal 37 and ground.

37 - Ground

: Continuity should not exist

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

Repair or replace harness.