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.
Wireless Door Lock Control System

Symptom

Suspected Area

See page

Wireless control function and entry function do not operate

Proceed to "All Door Entry Lock / Unlock Functions and Wireless Functions do not Operate"

Wireless control function does not operate but entry function operates

Electrical key transmitter sub-assembly

-

Only answer-back function does not operate normally

Proceed to "No answer-back"

Only automatic lock function does not operate normally

Perform operation check

Lighting system (front door courtesy light switch circuit)

Lighting system (rear door courtesy light switch circuit)

Main body ECU (multiplex network body ECU)

-

Only illuminated entry function does not operate

Perform operation check

Lighting system

Main body ECU (multiplex network body ECU)

-

Only door ajar warning function does not operate

Perform operation check

Lighting system (front door courtesy light switch circuit)

Lighting system (rear door courtesy light switch circuit)

Main body ECU (multiplex network body ECU)

-

Only panic alarm function does not operate

Perform operation check

Lighting system (interior lights)

Lighting system (hazard warning lights)

Horn system

Main body ECU (multiplex network body ECU)

-

Operation Check
OPERATION CHECK 1. NOTICE WHEN CHECKING FOLLOWING (a) Wireless door lock/unlock function: This wireless door lock control function operates only when the following 3 conditions are met: (1) The ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION The ECU stores trouble codes when malfunctions occur. The diagnostic system allows for reading of the trouble codes from the DLC3. Use the Techstream to help diagno ...

Other materials:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the smart key system (for Entry Function). *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

Voice Recognition Microphone Disconnected (B1579)
DESCRIPTION The navigation receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. This DTC is stored when the microphone connection detection signal is disconnected. DTC Code DTC Detection Con ...

Transponder Chip Malfunction (B2793,B2794,B2797,B2798)
DESCRIPTION DTC B2793 is stored when a malfunction is found in the key during key code registration or a key code is not registered normally. Replace the key if key code registration cannot be performed normally and this DTC is output. DTC B2794 is stored when a key with an i ...

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