Connect the intelligent tester to the DLC3.

The diagnosis function makes the master warning light and the multi-information display come on, and the CRUISE main indicator light blinks as shown in the illustration. When a malfunction occurs in the dynamic radar cruise control system, the DTCs are stored in the ECM.

Reference: waveform 1

Lexus IS250 IS220d GSE20 ALE20 CRUISE CONTROL

Connect the intelligent tester to the DLC3.

Inspect the SET function.

Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.

The dynamic radar cruise control system has two cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.

Lexus IS250 IS220d GSE20 ALE20 CRUISE CONTROL

Lexus IS250 IS220d GSE20 ALE20 CRUISE CONTROL