Check Key Switch

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH
With CONSULT-II

Check key switch "IGN KEY SW" in "DATA MONITOR" mode with CONSULT-II.
1. Key is inserted in ignition key cylinder : IGN KEY SW ON
2. Key is removed from ignition key cylinder : IGN KEY SW OFF
Fig 1: Display ACC Power Data Monitor Sheet With Consult-II
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between BCM connector and ground.

Fig 2: Check Voltage Between BCM Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Identifying BCM Connector And Ground Table
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> Key switch is OK.

NG >> GO TO 2.
CHECK KEY SWITCH CIRCUIT
1. Disconnect key switch connector.
2. Check continuity between BCM connector M4 terminal 69 (PU/W) and key switch connector M64 terminal 4 (PU/W).
  1. 69 (PU/W) - 4 (PU/W) : Continuity should exist.
3. Check continuity between BCM connector M4 terminal 69 (PU/W) and ground.
  1. 69 (PU/W) - Ground : Continuity should not exist.
OK or NG

OK >> GO TO 3.

NG >> Repair or replace harness.
CHECK KEY SWITCH
Check continuity between key switch terminals 3 and 4.

Fig 5: Identifying Continuity Between Key Switch Terminals 3 And 4
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: Checking Continuity Between Key Switch Terminals 3 And 4
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> Check the following.
- 10A fuse [No. 32, located in fuse block (J/B) No.2]
- Harness for open or short between key switch and fuse
NG >> Replace key switch.