2. Check Stop Lamp Switch Circuit

WARNING: This page is about a different car, the 2004 Infiniti M45 and 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

With CONSULT-II

See "STOP LAMP" in "DATA MONITOR" mode.

When brake pedal is released : STOP LAMP SW OFF

When brake pedal is depressed : STOP LAMP SW ON

Fig 1: Stop Lamp Switch in Data Monitor Display

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

Without CONSULT-II

Disconnect ASCD control unit connector.
Check voltage between ASCD control unit harness connector M35 terminal 23 (R/W) and ground.
When brake pedal is released : 0V

When brake pedal is depressed : Approx. 12 V

Fig 2: Checking Stop Lamp Switch Circuit

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

Refer to wiring diagram in SYSTEM WIRING DIAGRAMS .

OK or NG

OK: ASCD brake/stop lamp switch is OK.
NG: Check the following.
- 15A fuse [No. 17, located in the fuse block (J/B) NO. 1]
- Harness for open or short between ASCD control unit and stop lamp switch
- Harness for open or short between fuse and stop lamp switch
- Stop lamp switch
  Refer to ELECTRICAL COMPONENT INSPECTION