Key Switch (Insert) Check

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. 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 Display - Data Monitor

Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between BCM connector M18 terminal 37 and ground.

KEY SWITCH INPUT SIGNAL

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

Fig 2: Checking Voltage Between BCM Terminal 37 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Key switch (insert) circuit is OK.

NG: GO TO 2.

CHECK KEY SWITCH (INSERT)

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

KEY SWITCH (INSERT)

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

Fig 3: Checking Key Switch (Insert)

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Repair or replace harness.

NG: Replace key switch.