The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is opened and turns off when the engine hood is closed.

When the theft deterrent system detects that the vehicle is being tampered with, the system sets off the alarm, causing the horns or siren to sound and the lights to light up or blink in order to alert people around the vehicle to the theft.

Disconnect the J75 ECU connector and R5 light connector.

Disconnect the J75 ECU connector and R5 light connector.

Delete DTC .

Lexus IS250 IS220d GSE20 ALE20 THEFT DETERRENT

Connect the intelligent tester to the DLC3.

Connect the intelligent tester to the DLC3.

Theft deterrent system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.

Disconnect the main body ECU RH (cowl side J/B RH) connectors.