Key Switch (BCM Input)

KEY SWITCH (BCM INPUT)

Diagnosis Procedure

Regarding Wiring Diagram information, Wiring Diagram - King Cab or Wiring Diagram - Crew Cab.

1. CHECK KEY SWITCH INPUT SIGNAL

With CONSULT
Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT. CONSULT Function.
- When key is inserted to ignition key cylinder:
KEY ON SW: ON
- When key is removed from ignition key cylinder:
KEY ON SW: OFF
Without CONSULT





Check voltage between BCM connector M18 terminal 37 and ground.





Is the inspection result normal?
YES- Key switch (insert) circuit is OK.
NO- GO TO 2

2. CHECK KEY SWITCH (INSERT)

1.Turn ignition switch OFF.
2.Disconnect key switch connector.
3.Check continuity between key switch terminals.










Is the inspection result normal?
YES- Repair or replace harness or fuse.
NO- Replace key switch.