Toyota Corolla (E120): Circuit description

The cruise control ecu assy power source supplies power to the actuator and sensors, etc., When terminal gnd and the case of the cruise control ecu assy are grounded.

Wiring diagram

Inspection procedure

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    Using a flat bed truck
    If you use chains or cables to tie down your vehicle, the angles shaded in black must be 45°. Do not overly tighten the tie downs or the vehicle may be damaged. ■Before emergency towing 1 Vehicles without a smart key system: Put the engine switch in the “ACC” (engine off) or “O ...

    RCTA (Rear Cross Traffic Alert) function
    The RCTA function uses the BSM rear side radar sensors installed behind the rear bumper. This function is intended to assist the driver in checking areas that are not easily visible when backing up. WARNING ■Cautions regarding the use of the system The driver is solely responsible for safe driving ...

    How to proceed with troubleshooting
    1 Vehicle brought to workshop 2 Customer problem analysis 3 Check and clear dtcs and freeze frame data 4 Problem symptom confirmation Symptom does not occur: go to step 5 Symptom occurs: go to step 6 5 Symptom simulation 6 Dtc check There is no output: go to step 7 There is outp ...