Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Interior / Door Lock / Wireless Door Lock Control System(w/ Smart Key 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Wireless Door Lock Control System

Symptom	Suspected Area	See page
Wireless control function and entry function do not operate	Proceed to "All Door Entry Lock / Unlock Functions and Wireless Functions do not Operate"
Wireless control function does not operate but entry function operates	Replace door control transmitter	-
Only answer-back function does not operate	Proceed to "No Answer-Back"
Only automatic lock function does not operate	Proceed to "Door Courtesy Switch Circuit"
	Proceed to "Back Door Courtesy Switch Circuit"
	Main body ECU
Only illuminated entry function does not operate	Lighting system
Only door ajar warning function does not operate	Proceed to "Door Courtesy Switch Circuit"
	Proceed to "Back Door Courtesy Switch Circuit"
	Main body ECU
Only panic alarm function does not operate	Theft deterrent system

Operation Check

OPERATION CHECK 1. NOTICES WHEN CHECKING (a) Wireless door lock/unlock function: The wireless door lock control function operates only when the following conditions are met: The engine sw ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) (See page ). (b) Measure th ...

Other materials about Toyota 4Runner:

Glass Position Initialization Incomplete (B2313)
DESCRIPTION The power window regulator motor is driven by operating the power window switch. The power window regulator motor assembly has a motor and ECU. When the ECU determines that the power window regulator motor has not been initialized, DTC B2313 ...

Automatic door locking and unlocking systems
The following functions can be set or canceled: Setting and canceling the functions To switch between setting and canceling, follow the procedure below: Vehicles without a smart key system Close all the doors and turn the engine switch to the “ON� ...