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:

Removal
REMOVAL CAUTION / NOTICE / HINT Text in Illustration *a Object Exceeding Weight Limit of Transmission Jack Be sure to perform this procedure with several people as the rear differential carrier assembly is very heavy. Be sure to follow the procedure ...

Input/Turbine Speed Sensor "A" Circuit Short to Battery (P071512,P071514,P071531)
DESCRIPTION This sensor detects the rotation speed of the turbine which shows the input turbine speed of the transmission. By comparing the input turbine speed signal (NT) with the output shaft speed sensor signal (SP2), the ECM detects the shift timing of the gears and appropriately controls ...

Multi-terrain Select Indicator Light Remains ON
DESCRIPTION Refer to Multi-terrain Select Indicator Light does not Come ON (See page ). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ). Inspect the fuses for circuits related ...