Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

  • 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.
Power Door Lock Control System

Symptom

Suspected Area

See page

Only Driver Door LOCK/UNLOCK Functions do not Operate

Front door lock assembly LH

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

Driver side junction block

Only Front Passenger Door LOCK/UNLOCK Functions do not Operate

Front door lock assembly RH

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

Driver side junction block

Only Rear Door LH LOCK/UNLOCK Functions do not Operate

Rear door lock assembly LH*2

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

Driver side junction block

Only Rear Door RH LOCK/UNLOCK Functions do not Operate

Rear door lock assembly RH*2

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

Driver side junction block

Speed-sensitive automatic door lock function does not operate (meter / gauge system operates normally)

Harness or connector

-

Combination meter assembly

Main body ECU (Multiplex network body ECU)

Driver door-linked automatic door unlock function does not operate

Main body ECU (Multiplex network body ECU)

Key lock-in prevention function does not operate

Unlock warning switch assembly

Harness or connector

-

Main body ECU (Multiplex network body ECU)

All Doors LOCK/UNLOCK Functions do not Operate

Main body ECU (Multiplex network body ECU)

All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder

Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder"

All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch"

Lock Operation Continues even after Doors have been Locked*1

Front door lock assembly LH

Front door lock assembly RH

Rear door lock assembly LH*2

Rear door lock assembly RH*2

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

  • *1: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 3 times.
  • *2: for Double Cab
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 p ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Disconnect the MB main body ECU (multiplex network body ECU) connectors. (b) Measure the ...

Other materials:

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Smart Access or Main Body / Trouble Codes. (e) Check the details of the DTC(s) (See page ). 2. CLEAR DTC ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE STEERING GEAR OUTLET RETURN TUBE (a) Using a union nut wrench, remove the steering gear outlet return tube. 2. REMOVE STEERING TURN PRESSURE TUBE (a) Using a union nut wrench, remove the 2 pressure tubes. (b) Remove the 4 O-rings from the pressure tubes. 3. ...

Sound of Portable Player cannot be Heard from Speakers or Sound is Low
PROCEDURE 1. CHECK PORTABLE PLAYER SETTINGS (a) Check the portable player settings. (1) Check that the volume is not set to "0". (2) Check that the mute is off. (b) Check that the sound of the portable player can be heard from the speakers. OK: Sound ...

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