Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

Toyota Tacoma 2015-2018 Service Manual / Door Lock / Power Door Lock Control System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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
Only Driver Door LOCK/UNLOCK Functions do not Operate	Front door lock assembly LH
	Wire harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Driver side junction block
Only Front Passenger Door LOCK/UNLOCK Functions do not Operate	Front door lock assembly RH
	Wire harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Driver side junction block
Only Rear Door LH LOCK/UNLOCK Functions do not Operate	Rear door lock assembly LH*2
	Wire harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Driver side junction block
Only Rear Door RH LOCK/UNLOCK Functions do not Operate	Rear door lock assembly RH*2
	Wire harness or connector	-
	Main body ECU (Multiplex network body ECU)
	Driver side junction block
Speed-sensitive automatic door lock function does not operate (meter / gauge system operates normally)	Harness or connector	-
	Combination meter assembly
	Main body ECU (Multiplex network body ECU)
Driver door-linked automatic door unlock function does not operate	Main body ECU (Multiplex network body ECU)
Key lock-in prevention function does not operate	Unlock warning switch assembly
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)
All Doors LOCK/UNLOCK Functions do not Operate	Main body ECU (Multiplex network body ECU)
All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder	Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder"
All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch	Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch"
Lock Operation Continues even after Doors have been Locked*1	Front door lock assembly LH
	Front door lock assembly RH
	Rear door lock assembly LH*2
	Rear door lock assembly RH*2
	Wire harness or connector	-
	Main body ECU (Multiplex network body ECU)

*1: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 3 times.
*2: for Double Cab

Data List / Active Test

DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Disconnect the MB main body ECU (multiplex network body ECU) connectors. (b) Measure the ...

Other materials:

Precaution
PRECAUTION 1. PRECAUTIONS WHEN USING TECHSTREAM (a) When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the DLC3, and turn a courtesy light switch on and off at 1.5 second or less intervals until communication between the Techstream and vehicle begin ...

Charging Failure
PROCEDURE 1. CHECK GENERATOR PULLEY WITH CLUTCH (ON-VEHICLE INSPECTION) (a) Start the engine and visually check if the fan of the generator rotor assembly located inside the generator assembly is operating. OK: The fan of the generator rotor assembly is operati ...

Pedestrian Protection System
Your vehicle is equipped with a pedestrian protection system which is designed to lift the rear part of the hood when a pedestrian is detected during a frontal impact within the approximate speed range. When the vehicle is involved in a frontal impact with an object or a pedestrian, sensors in the ...