Check Key Switch Circuit (Without Intelligent Key)

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH (WITH CONSULT-III)

With CONSULT-III

Touch "BCM". With "IGN KEY SW" on the DATA MONITOR, Check ON/OFF operation.

*: Refer to "DATA MONITOR "

KEY SWITCH (WITH CONSULT-III)

Monitor item [OPERATION or UNIT]		Contents
IGN KEY SW*	"ON/OFF"	Key inserted (ON)/key removed (OFF) status judged from the key-in detection switch is displayed.

OK or NG

OK: Key switch circuit is OK.

NG: GO TO 2.

CHECK KEY SWITCH AND KEY LOCK SOLENOID POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key switch connector.
3. Check voltage between key switch connector M23 terminal 2 and ground.
  2 (L/R) - Ground : Battery voltage.
  
  Fig 1: Identifying Voltage Between Key Switch Connector Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 3.

NG: Check harness between key switch and fuse.

CHECK KEY SWITCH

Check continuity between key switch connector M23 terminal 1 and 2.

KEY SWITCH

Connector	Terminal		Condition	Continuity
M23	1	2	Key is inserted in ignition key cylinder.	Yes
M23	1	2	Key is removed from ignition key cylinder.	No

OK or NG

OK: GO TO 4.

NG: Replace key switch.

CHECK HARNESS CONTINUITY
1. Disconnect key switch connector and BCM connector.
2. Check continuity between key switch connector M23 terminal 1 and BCM connector M3 terminal 37.
  1 (B/W) - 37 (B/W) : Continuity should exist.
3. Check continuity between key switch connector M23 terminal 1 and ground.
  1 (B/W) - Ground : Continuity should not exist.
  
  Fig 2: Identifying Continuity Between Key Switch Connector Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Key switch circuit is OK.

NG: Repair or replace harness between key switch and BCM.