Toyota Corolla Cross: Problem Symptoms Table

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Entry Function, Hev Model) / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
When the electrical key transmitter sub-assembly is brought near a door control receiver (RF band), door outside handle assembly (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
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.

Smart key system (for Entry Function)

Symptom	Suspected Area	Link
Key vehicle inside lock-in prevention function does not operate	Affected by wave interference
	Harness or connector
	No. 1 indoor electrical key antenna assembly (front floor)
	No. 3 indoor electrical key antenna assembly (inside luggage compartment)
	Certification ECU (Smart key ECU assembly)
	Transmitter battery
	Power distribution box assembly
	Power switch
All door entry lock/unlock functions and wireless functions do not operate	Lighting system
	Power door lock control system
	Affected by wave interference
	Code registration
	Transmitter battery
	Harness or connector
	Electrical key transmitter sub-assembly
	Door control receiver
	Main body ECU (Multiplex network body ECU)
	Certification ECU (Smart key ECU assembly)
All door entry lock/unlock functions do not operate, but wireless functions operate	Affected by wave interference
	Electrical key transmitter sub-assembly
	Certification ECU (Smart key ECU assembly)
Driver side door entry unlock function does not operate	Power door lock control system
	Harness or connector
	Front door outside handle assembly (for driver door)
	Lighting system
	Certification ECU (Smart key ECU assembly)
Front passenger side door entry unlock function does not operate	Power door lock control system
	Harness or connector
	Front door outside handle assembly (for front passenger door)
	Lighting system
	Certification ECU (Smart key ECU assembly)
Driver side door entry lock and unlock functions do not operate	Power door lock control system
	Affected by wave interference
	Harness or connector
	Front door outside handle assembly (for driver door)
	Certification ECU (Smart key ECU assembly)
Front passenger side door entry lock and unlock functions do not operate	Power door lock control system
	Affected by wave interference
	Harness or connector
	Front door outside handle assembly (for front passenger door)
	Certification ECU (Smart key ECU assembly)
Driver side door entry lock function does not operate	Power door lock control system
	Harness or connector
	Front door outside handle assembly (for driver door)
	Certification ECU (Smart key ECU assembly)
Front passenger side door entry lock function does not operate	Power door lock control system
	Harness or connector
	Front door outside handle assembly (for front passenger door)
	Certification ECU (Smart key ECU assembly)
Entry interior alarm does not sound	Meter/gauge System
Back door entry unlock function does not operate	Power door lock control system
	Harness or connector
	Back door opener switch sub-assembly
	Certification ECU (Smart key ECU assembly)
Back door entry lock and unlock function does not operate	Power door lock control system
	Harness or connector
	Back door opener switch sub-assembly
	Electrical key antenna (outside luggage compartment)
	Certification ECU (Smart key ECU assembly)
Back door entry lock function does not operate	Power door lock control system
	Harness or connector
	Back door opener switch sub-assembly
	Certification ECU (Smart key ECU assembly)
Touching unlock sensor for certain period of time does not unlock all doors	Check customize setting (Door Unlock Sensor Touch Time Adjust)
	Power door lock control system
	Certification ECU (Smart key ECU assembly)
Entry lock function does not operate using close & lock function*1	Power back door system
Entry Exterior Alarm and Answer-back Buzzer do not Sound	Check customize setting (Wireless Buzzer Response Function)
	Wireless door lock control system
	Lighting system
	Acoustic vehicle alerting system
	Certification ECU (smart key ECU assembly)

*1: w/ Power Back Door System

SEE MORE:

Transponder Chip Malfunction (B2793,B2797)

DESCRIPTION DTC B2793 is stored when a malfunction is found in the door control transmitter assembly during key ID code registration or a key ID code is not registered normally. Replace the door control transmitter assembly if key ID code registration cannot be performed normally and this DTC i

Removal

REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL) Procedure Part Name Code 1 PRECAUTION - - - 2 DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL - - - - 3 FRONT BUMPER ASSEMBLY - -

Toyota Corolla Cross: Problem Symptoms Table

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Data List / Active Test

Diagnostic Trouble Code Chart

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Transponder Chip Malfunction (B2793,B2797)

Removal