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Check Key Switch (BCM Input)

KEY SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition knob OFF position.
2. Disconnect key switch connector and key lock solenoid connector.
3. Check voltage between key switch and key lock solenoid connector M22 terminal 3 (L/R) and ground.
  3 (L/R) - Ground: Battery voltage.
OK or NG
1. OK: GO TO 2.
2. NG: Check harness between key switch and key lock solenoid and fuse.
  
  Fig 1: Inspecting Key Switch Power Supply Circuit (BCM Input)
  Courtesy of NISSAN MOTOR CO., U.S.A.

KEY SWITCH INSPECTION

Check continuity between key switch as follows.

TERMINALS CONTINUITY SPECIFICATIONS

Connector	Terminals	Condition	Continuity
M22	3-4	Key is inserted in ignition key cylinder.	Yes
M22	3-4	Key is removed from ignition key cylinder.	No

Fig 2: Inspecting Key Switch

G03107038

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

OK or NG

OK: GO TO 3.
NG: Replace detention switch.

KEY SWITCH SIGNAL CIRCUIT INSPECTION
1. Disconnect key switch and ignition knob switch connector and BCM connector.
2. Check continuity between key switch and ignition knob switch connector M22 terminal 4 (B/W) and BCM connector M3 terminal 37 (B/W).
  4 (B/W) - 37 (B/W): Continuity should exist.
3. Check continuity between key switch and ignition knob switch connector M22 terminal 4 (B/W) and ground.
  4 (B/W) - Ground: Continuity should not exist.
  
  Fig 3: Inspecting Key Switch Signal Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Key switch (BCM input) circuit is OK.
2. NG: Repair or replace harness between key switch and ignition knob switch and BCM.