Toyota Yaris: Warning/Indicator Lights and Warning Sounds / Message Indicated on Display

Taking Action

Take the appropriate action and verify that the warning light turns off. KEY Warning Light Take the appropriate action and verify that the warning light turns off...

Stop Vehicle in Safe Place Immediately

If the following messages are displayed in the center display, a vehicle system may be malfunctioning. Stop the vehicle in a safe place and contact your Toyota dealer...

Other information:

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: MIL Circuit

DESCRIPTION The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM. The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL should be illuminated and should then turn off after the engine is started...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received (U040181)

DESCRIPTION If the ECM cannot recognize the millimeter wave radar sensor assembly. DTC U040181 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from U040181 Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received Approximately 17 seconds or more after the ignition switch is turned to ON, the ECM cannot recognize the millimeter wave radar sensor assembly for approximately 5 seconds or more...