Toyota Yaris: Front Radar Sensor System / Terminals Of Ecu

NOTICE:

• Turning the ignition switch to ON with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed.
• Do not apply excessive force to the millimeter wave radar sensor assembly connector.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table...

Diagnosis System

DIAGNOSIS SYSTEM DIAGNOSIS FUNCTION (a) If a malfunction is detected in the millimeter wave radar sensor assembly, the millimeter wave radar sensor assembly stores DTCs without directly informing the driver, and sends malfunction signals to the systems that use the millimeter wave radar sensor assembly...

Other information:

Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: VEHICLE CONTROL HISTORY (RoB)

VEHICLE CONTROL HISTORY (RoB) DESCRIPTION (SFI SYSTEM) Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior. If the customer states that the engine stalls or will not start, it may be possible to diagnose the cause of the malfunction by checking the vehicle history information and freeze frame data...

Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: STA Signal Circuit

DESCRIPTION While the engine is being cranked, a starter operation request signal is sent to terminal STA of the ECM. HINT: If there is an open in the STA circuit of the ECM, stop and start control will be prohibited after the third time the engine is started by stop and start control...