Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

Toyota Tacoma 2015-2018 Service Manual / Door Lock / Wireless Door Lock Control System(w/o 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
Only wireless control function is inoperative	Proceed to "Only wireless control function is inoperative"
Only answer-back function does not operate normally	Proceed to "No answer-back"
Only automatic lock function does not operate normally	Perform the operation check
	Key reminder warning system
	Lighting system (front door courtesy light switch circuit)
	Lighting system (rear door courtesy light switch circuit)
	Main body ECU (multiplex network body ECU)	-
Only illuminated entry function does not operate	Perform the operation check
	Lighting system
	Main body ECU (multiplex network body ECU)	-
Only door ajar warning function does not operate	Perform the operation check
	Lighting system (front door courtesy light switch circuit)
	Lighting system (rear door courtesy light switch circuit)
	Main body ECU (multiplex network body ECU)	-
Only panic alarm function does not operate	Perform operation check
	Lighting system (int) (interior lights)
	Lighting system (ext) (headlights, taillights, hazard lights)
	Theft deterrent system (vehicle horn)*1
	Horn system*2
	Main body ECU (multiplex network body ECU)	-

*1: w/ Theft Deterrent System
*2: w/o Theft Deterrent System

Customize Parameters

CUSTOMIZE PARAMETERS PROCEDURE 1. CUSTOMIZE WIRELESS DOOR LOCK CONTROL SYSTEM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, firs ...

Registration

REGISTRATION CAUTION / NOTICE / HINT HINT: Register a new recognition code when replacing the door control transmitter module set sub-assembly or the door control receiver. Add mode ...

Other materials:

Power Source Circuit
DESCRIPTION This circuit provides power to operate the forward recognition camera. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCEDURE 1. CHECK HARNESS A ...

Differential System(w/o Differential Lock)
Precaution PRECAUTION 1. Before disassembly, clean the outside of the front and rear differential assembly and remove any sand and mud to prevent it from entering the assembly during disassembly and installation. 2. When removing connected parts made of a light alloy, such as front and rear ...

No Sound can be Heard from Speakers
PROCEDURE 1. CHECK AUDIO SETTINGS (a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal. OK: Audio system returns to normal. HINT: Sound quality adjustment measures vary according to the type ...