Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Lane Departure Alert 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.
When replacing the combination meter assembly, make sure to replace it with a new one.

Lane Departure Alert System

Symptom	Suspected Area	Link
Lane departure alert system does not operate	Power source circuit
	Lane departure alert main switch circuit
	CAN communication system
	Forward recognition camera
Lane departure alert indicator abnormal (Does not turn on)	Lane departure alert indicator circuit
	Lane departure alert main switch circuit
	CAN communication system
	Combination meter assembly
	Forward recognition camera
Lane departure alert indicator abnormal (Remains on)	Lane departure alert indicator circuit
	Lane departure alert main switch circuit
	CAN communication system
	Combination meter assembly
	Forward recognition camera
Lane departure alert system is not canceled even when turn signal light switch is operated	Data List / Active Test (Check turn signal switch signal)
	Turn signal light switch circuit
	Forward recognition camera
Increase in cases that driver can see line markers but system cannot detect lane markers	Windshield glass is dirty	-
	Forward recognition camera is dirty	-
	Headlight assemblies are dirty or worn	-
	Non-standard suspension is installed	-
	Non-standard tires are installed	-
	Non-Toyota genuine windshield glass is installed	-
	There is a foreign object or foreign matter between the windshield glass and forward recognition camera	-
	A sticker or similar item is attached to the area in front of the forward recognition camera	-
	Adjust forward recognition camera
	Forward recognition camera
Lane departure alert system is operating, but no operation condition is displayed on multi-information display in combination meter assembly	Data List / Active Test (Check the item LDA Control)
	Combination meter assembly
	Forward recognition camera
Buzzer does not sound even when lane markers are lost while lane departure warning function is operating	Combination meter assembly
	Forward recognition camera

Customize Parameters

CUSTOMIZE PARAMETERS CUSTOMIZE LANE DEPARTURE ALERT SYSTEM NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to ...

Utility

UTILITY NOTICE: If the forward recognition camera has been replaced due to a malfunction in the lane departure alert system, be sure to perform Recognition Camera/Target Position Memory and Opti ...

Other materials:

Initialization not Completed (C2177/77)
DESCRIPTION Initialization is necessary if one of the following occurs: The tire pressure warning ECU and receiver is replaced. A tire pressure warning valve and transmitter is replaced. Tires with different standard tire pressures are installed. The tires are rotated. A new ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Smart key system (for start function) data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform rep ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STEERING PAD (for Vehicle not Involved in Collision) (a) Perform a diagnostic system check (See page ). (b) With the steering pad installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the steering pad ...