Key Switch Circuit Check (Without Intelligent Key)

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH
With CONSULT-II

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

*: Refer to "DATA MONITOR "

Fig 1: Monitor Item Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Data Monitor Display
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

GO TO 2.

OK or NG
1. OK : Key switch circuit is OK.
2. 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.
1. 2 (L/R) - Ground : Battery voltage.
OK or NG
1. OK : GO TO 3.
2. NG : Check harness between key switch and fuse.
Fig 3: Checking Voltage Between Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK KEY SWITCH

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

DIAGNOSIS PROCEDURE

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.

Fig 4: Checking Continuity Between Key Switch Connector M23 Terminal 1 And 2

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

CHECK HARNESS CONTINUITY
1. Disconnect key switch and connector and BCM connector.
2. Check continuity between key switch connector M23 terminal 1 and BCM connector M3 terminal 37.
  1. 1 (B/W) - 37 (B/W) : Continuity should exist.
3. Check continuity between key switch connector M23 terminal 1 and ground.
  1. 1 (B/W) - Ground : Continuity should not exist.
OK or NG
1. OK : Key switch and circuit is OK.
2. NG : Repair or replace harness between key switch and BCM.
Fig 5: Checking Continuity Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.