Problem Symptoms Table [08/2019 - ]

WARNING: This page is about a different car, the 2021 Toyota Tundra and 2020 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Engine Immobiliser System.

Refer to REGISTRATION [08/2019 - ]

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

WIRELESS DOOR LOCK CONTROL SYSTEM

Symptom	Suspected Area	See Reference
Wireless control function and entry function do not operate	Proceed to "All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate"	Refer to All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [08/2019 - ]
Wireless control function does not operate but entry function operates	Replace electrical key transmitter	-
Only answer-back function does not operate	Proceed to "No Answer-Back"	Refer to No Answer-Back [08/2019 - ]
Only automatic lock function does not operate	Proceed to "Door Courtesy Switch Circuit"	Refer to Door Courtesy Switch Circuit [08/2019 - ]
Only automatic lock function does not operate	Main body ECU (multiplex network body ECU)	Refer to REMOVAL [08/2019 - ]
Only illuminated entry function does not operate	Lighting system (INT)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ]
Only door ajar warning function does not operate	Check customize setting (Open Door Warning)	Refer to CUSTOMIZE PARAMETERS [08/2019 - ]
	Proceed to "Door Courtesy Switch Circuit"	Refer to Door Courtesy Switch Circuit [08/2019 - ]
	Main body ECU (multiplex network body ECU)	Refer to REMOVAL [08/2019 - ]