Key Switch and Key Lock Solenoid Circuit Check

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH AND KEY LOCK SOLENOID

With CONSULT-II

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

KEY SWITCH AND KEY LOCK SOLENOID CIRCUIT CHECK CHART

Monitor item [OPERATION or UNIT]

Contents

IGN KEY SW⁽¹⁾

"ON/OFF"

Key inserted (ON)/key removed (OFF) status judged from the key-in detection switch is displayed.

⁽¹⁾	Refer to "DATA MONITOR ".

Fig 1: Scan Tool Displaying DATA MONITOR

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

Without CONSULT-II

GO TO 2.

OK or NG

OK: Key switch and key lock solenoid circuit is OK.
NG: GO TO 2.

KEY SWITCH AND KEY LOCK SOLENOID (KEY SWITCH) POWER SUPPLY CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Check voltage between key switch and key lock solenoid connector M28 terminal 3 (Y/R) and ground.
  3 (Y/R) - Ground: Battery voltage.
OK or NG
1. OK: GO TO 3.
2. NG: Check harness between key switch and key lock solenoid and fuse.
  
  Fig 2: Checking Voltage Between Key Switch And Key Lock Solenoid Connector M28 Terminal 3 (Y/R) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK KEY SWITCH AND KEY LOCK SOLENOID (KEY SWITCH)

Check continuity between key switch and key lock solenoid (key switch) as follows.

CONTINUITY CHECK CHART

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

Fig 3: Checking Continuity Between Key Switch And Key Lock Solenoid (Key Switch)

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

OK or NG

OK: GO TO 4.
NG: Replace key switch and key lock solenoid (key switch).

CHECK HARNESS CONTINUITY
1. Check continuity between BCM connector M34 terminal 37 (B/R) and key switch and key lock solenoid (key switch) connector M28 terminal 4 (B/R).
  37 (B/R) - 4 (B/R): Continuity should exist.
2. Check continuity between BCM connector M34 terminal 37 (B/R) and ground.
  37 (B/R) - Ground: Continuity should not exist.
OK or NG
1. OK: Key switch and key lock solenoid circuit is OK.
2. NG: Repair or replace harness between key switch and key lock solenoid (key switch) and BCM.
  
  Fig 4: Checking Continuity Between BCM Connector And Key Switch And Key Lock Solenoid (Key Switch) Connector, And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.