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:

Steering Angle Sensor Unusual Bank Angle Detected (C1440)
DESCRIPTION If the skid control ECU determines that the vehicle is being driven at a steep bank angle, the skid control ECU stores DTC C1440 while VSC operation is temporarily disabled. It is not a malfunction if the system and sensor circuits are normal ...

Inspection
INSPECTION PROCEDURE 1. INSPECT SIDE AUTO STEP MOTOR ASSEMBLY (a) Check that the motor gear rotates smoothly as follows. NOTICE: Do not apply positive (+) battery voltage to any terminals except terminal 5 and 4 to avoid damaging the pu ...