Key Switch (insert) Check

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II

Check ignition key cylinder switch "KEY ON SW" in "DATE MONITOR" mode with CONSULT-II
- When key is inserted in ignition key cylinder
  - KEY ON SW :ON
- When key is removed in ignition key cylinder
  - KEY ON SW :OFF
Fig 1: Scan Tool Display "Data Monitor"
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between BCM connector and ground.

Fig 2: BCM Connector Terminal 37 & Ground Voltage Specifications Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: BCM Connector Terminal 37 & Ground Voltage Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK : Key switch is OK.
- NG : GO TO 2.
CHECK KEY SWITCH (INSERT)
1. Turn ignition switch OFF.
2. Disconnect key switch connector.
3. Check continuity between key switch terminals 1 and 2.
Fig 4: Key Switch Terminals 1 & 2 Continuity Specifications Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Key Switch Terminals 1 & 2 Continuity Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK : GO TO 3.
- NG : Replace key switch.
CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M90 terminal 37 and key switch harness connector M25 terminal 1.
  - 37 (B/R) 1 (B/R) : Continuity should exist.
3. Check continuity between BCM harness connector M90 terminal 37 and ground.
  - 37 (B/R) - Ground : Continuity should not exist.
Fig 6: BCM Harness Connector M90 Terminal 37 & Key Switch Harness Connector M25 Terminal 1 & Ground Continuity Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK : Check the following.
  - 10A fuse [No. 21, located in the fuse block (J/B)]
  - Harness for open or short between key switch and fuse
- NG : Repair harness or connector.