Toyota Yaris: Power Integration System / Problem Symptoms Table

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Power Source & Network / Power Distribution / Power Integration System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of the problem symptom. 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. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Semiconductor Power Integration ECU

Symptom	Suspected Area	Link
LED headlight does not illuminate	Lighting system
Daytime running light does not illuminate	Lighting system
Fog lights do not illuminate	Lighting system

Power Distribution Box Assembly

Symptom	Suspected Area	Link
Rear taillights does not illuminate	Lighting system
Back-up light does not illuminate	Lighting system
Rear lights do not illuminate	Lighting system
Rear defogger does not operate	Window Defogger System
Panel lights do not illuminate	Lighting system
Mirror heater does not operate	Power Mirror Control System
Power retract mirror does not operate	Power Mirror Control System
Driver side seat heater does not operate (w/ Front Seat Heater)	Seat heater system
Front passenger side seat heater does not operate (w/ Front Seat Heater)	Seat heater system
Driver side seat belt warning light does not operate	Seat Belt Warning System
Front passenger side seat belt warning light does not operate	Seat Belt Warning System

Utility

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Terminals Of Ecu

TERMINALS OF ECU NOTICE: After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal...

Other information:

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

DISASSEMBLY CAUTION / NOTICE / HINT NOTICE: Be sure to read Precaution thoroughly before servicing. Click here Handle components indoors as much as possible to prevent foreign matter from entering and adhering to headlight assembly components...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Terminals Of Ecu

TERMINALS OF ECU CHECK AWD ECU ASSEMBLY (a) Measure the voltage and resistance of the connector. Terminal No. (Symbol) Terminal Description Condition Specified Condition O119-1 (GND) - Body ground Ground Always Below 1 Ω O119-2 (BSLC) - O119-1 (GND) AWD ECU assembly power supply Always 11 to 14 V O119-13 (T1H) - O119-1 (GND) Temperature sensor (+) input Ignition switch ON 0...