Key Warning Light Does Not Come ON

DOOR LOCK: SMART KEY SYSTEM: Key Warning Light does not Come ON

Key Warning Light does not Come ON

DESCRIPTION

The certification ECU and combination meter communicate through the multiplex communication line (BEAN line). When the combination meter's key warning light does not illuminate / flash as specified Component Tests and General Diagnostics, one of the following is malfunctioning: 1) multiplex communication system, 2) certification ECU, or 3) combination meter.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MULTIPLEX COMMUNICATION SYSTEM
(a) Check that the multiplex communication system operates normally.
OK:
Multiplex communication system operates normally.
NG -- GO TO MULTIPLEX COMMUNICATION SYSTEM
OK -- Continue to next step.

2. CHECK OPERATION OF COMBINATION METER
(a) After replacing the combination meter with a new one, check that the key warning light operates normally.
OK:
Key warning light operates normally
NG -- REPLACE CERTIFICATION ECU
OK -- END