Toyota Corolla Cross: Problem Symptoms Table

Toyota Corolla Cross (2022-2026) Service Manual / Vehicle Interior / Seat / Rear Seat Reminder System / 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. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Rear Seat Reminder System

Symptom	Suspected Area	Link
Rear seat reminder function does not operate	CAN communication system (for HEV Model)
	CAN communication system (for Gasoline Model)
	IG signal circuit
	Rear door courtesy switch circuit
	Main body ECU (Multiplex network body ECU)
	Power distribution box assembly
	Hybrid vehicle control ECU*1
	ECM*2
	Combination meter assembly

*1: for HEV Model
*2: for Gasoline Model

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Precaution

PRECAUTION TROUBLESHOOTING PRECAUTIONS (a) When inspecting the rear brakes, disconnect the connector or disconnect the cable from the negative (-) auxiliary battery terminal in order to shut off the supply of electrical power. CAUTION: Do not perform the rear brake inspection while either

Back Door Courtesy Switch Circuit

DESCRIPTION The main body ECU (multiplex network body ECU) receives a back door open/closed signal from the back door courtesy light switch (back door lock assembly). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registr

Toyota Corolla Cross: Problem Symptoms Table

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Seat Heater Switch

Seat Heater System

Parts Location

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Precaution

Back Door Courtesy Switch Circuit