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:

System Description
SYSTEM DESCRIPTION 1. SEAT BELT WARNING SYSTEM DESCRIPTION (a) Seat belt warning light operation for driver seat belt: The seat belt warning light on the combination meter assembly illuminates, blinks or turns off in accordance with the driver seat belt state, vehicle speed, shift lever posit ...

Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) (P2759)
DESCRIPTION Refer to the system description for DTC P2757 (See page ). DTC No. DTC Detection Condition Trouble Area P2759 Open or short is detected in shift solenoid valve SLU circuit for 1 second or more while driving (1 trip dete ...

Pump Motor Relay (C1253)
DESCRIPTION The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU (master cylinder solenoid). DTC No. DTC Detecting Condition Trouble Areas C1253 ...

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