Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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 PROCEDURE 1. REMOVE REFRIGERANT FROM REFRIGERATION SYSTEM 2. REMOVE AIR CONDITIONER PRESSURE SENSOR (a) Disconnect the connector. (b) Using a 27 mm deep socket wrench, remove the air conditioner pressure sensor. T ...

Front Occupant Classification Sensor RH Collision Detection (B1786)
DESCRIPTION DTC B1786 is set when the occupant detection ECU receives a collision detection signal, which is sent by the front occupant classification sensor RH when an accident occurs. DTC B1786 is also set when the front seat with adjuster frame assembly RH is subjected to a strong impact, ...

Horn System
Parts Location PARTS LOCATION ILLUSTRATION Precaution PRECAUTION 1. IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section. Exp ...

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