Install the front seat inner belt assembly with the nut.

Measure the resistance between terminals of the switch when the switch is operated.

Using a screwdriver, disengage the 2 claws and remove the front outer seat track bracket cover.

Lexus IS250 IS220d GSE20 ALE20 SEAT BELT

with Navigation System:

The combination meter assembly detects the state of the front seat inner belt assembly RH when the front passenger seat is occupied with the engine switch on (IG). If the front passenger seat belt is not fastened, the front seat belt warning light on the multi-media module display blinks. If the seat belt is fastened, the warning light goes off.

without Navigation System:

When the engine switch on (IG), the center airbag sensor assembly transmits front seat inner belt state signals to the combination meter assembly though the CAN and BEAN. If the driver seat belt is not fastened, the combination meter assembly blinks the driver seat belt warning light. If the seat belt is fastened, the warning light goes off.

Turn the engine switch on (IG).

Performing the ACTIVE TEST using the intelligent tester allows the meters, indicators and so on to operate without removing any parts. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten labor time.

Data of the system can be read in the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use the intelligent tester to check for a malfunction and repair it.

Lexus IS250 IS220d GSE20 ALE20 SEAT BELT