Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control 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.

Power Door Lock Control System

Symptom	Suspected Area	See page
No Door Lock/Unlock Functions Operate Via Master Switch or Driver Side Door Key Cylinder	Proceed to "All Doors LOCK/UNLOCK Functions Operate Via Master Switch or Driver Side Door Key Cylinder"
Only Driver Door Lock/Unlock Functions do not Operate	Front door lock assembly LH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	-
	Driver side junction block assembly	-
Only Passenger Door Lock/Unlock Functions do not Operate	Front door lock assembly RH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	-
	Driver side junction block assembly	-
Only Rear Door LH Lock/Unlock Functions do not Operate	Rear door lock assembly LH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	-
	Driver side junction block assembly	-
Only Rear Door RH Lock/Unlock Functions do not Operate	Rear door lock assembly RH
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	-
	Driver side junction block assembly	-
Only Back Door cannot be Operated	Proceed to "Only Back Door cannot be Operated"

Initialization

INITIALIZATION 1. PROCEDURES NECESSARY WHEN CABLE IS DISCONNECTED/RECONNECTED TO BATTERY TERMINAL NOTICE: After the battery is reconnected, be sure to wait 10 seconds or more before att ...

Terminals Of Ecu

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

Other materials about Toyota 4Runner:

Navigation Receiver Assembly Power Source Circuit
DESCRIPTION This is the power source circuit to operate the navigation receiver assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCE ...

Inspection
INSPECTION PROCEDURE 1. INSPECT MAGNET CLUTCH ASSEMBLY (a) Check the magnet clutch operation. (1) Confirm that the magnet clutch hub and magnet clutch rotor lock when the positive (+) lead of the battery is connected to terminal 3 of the magnet clutch, ...