Key Switch (Insert) Check

WARNING: This page is about a different car, the 2005 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL

With CONSULT-II

Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT-II. Refer to "DATA MONITOR ".

When key is inserted to ignition key cylinder:
KEY ON SW: ON
When key is removed from ignition key cylinder:
KEY ON SW: OFF

Fig 1: CONSULT-II Function Display
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between BCM connector M18 terminal 37 and ground.

VOLTAGE SPECIFICATIONS

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

OK or NG

OK: Key switch circuit is OK.
NG: GO TO 2.

Fig 2: Checking Voltage Between BCM Connector M18 Terminal 37 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK KEY SWITCH (INSERT)

Turn ignition switch OFF.
Disconnect key switch connector.

Check continuity between key switch terminals.

CONTINUITY SPECIFICATIONS

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

OK or NG

OK: Repair or replace harness or fuse.
NG: Replace key switch.

Fig 3: Checking Continuity Between Key Switch Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.