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:

If you have a flat tire
Remove the flat tire and replace it with the spare provided. ■ Before jacking up the vehicle ● Stop the vehicle on a hard, flat surface. ● Set the parking brake. ● Shift the shift lever to P (automatic transmission) or R (manual transmission). ● Stop the engine. & ...

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 parts. This non-intrusive inspection can be very useful because intermittent conditions or signals ...

ABS Warning Light Remains ON
DESCRIPTION If any of the following is detected, the ABS warning light remains on. The skid control ECU (master cylinder solenoid) connectors are disconnected from the skid control ECU (master cylinder solenoid). There is a malfunction in the skid control ECU (master cylinder soleno ...

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