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:

Pressure Sensor Circuit (B1423/23)
DESCRIPTION This DTC is stored if refrigerant pressure on the high pressure side is extremely low (176 kPa (1.8 kgf/cm2, 26 psi) or less) or extremely high (3140 kPa (32.0 kgf/cm2, 455 psi) or more). The air conditioner pressure sensor, which is installed on the pipe on the high pressure side ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. (a) Turn the ignition switch to ON. (b) When the driver seat belt is not fastened, check th ...

Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When a malfunction occurs in the lane departure alert system, a message will be displayed on the multi-information display in the combination meter assembly and the lane departure alert system will be disabled depending on the malfunction. War ...

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