Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
  • When the electrical key transmitter sub-assembly is brought near the electrical key and TPMS receiver assembly (RF band), front outside door outside handle assembly LH (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
  • 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.
Smart Key System (for Entry Function)

Symptom

Suspected Area

See page

Entry Interior Alarm does not Sound

Meter/gauge system

Certification ECU (smart key ECU assembly)

-

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

Power door lock control system

Electrical key transmitter sub-assembly

-

Transmitter battery

-

Electrical key and TPMS receiver assembly

-

Certification ECU (smart key ECU assembly)

-

Harness or connector

-

All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate

Electrical key transmitter sub-assembly

Certification ECU (smart key ECU assembly)

-

Driver Door Entry Unlock Function does not Operate

Power door lock control system

Front door outside handle assembly LH

-

Certification ECU (smart key ECU assembly)

-

Harness or connector

-

Driver Door Entry Lock and Unlock Functions do not Operate

Power door lock control system

Front door outside handle assembly LH

-

Certification ECU (smart key ECU assembly)

-

Harness or connector

-

Driver Door Entry Lock Function does not Operate

Power door lock control system

Front door outside handle assembly LH

-

Certification ECU (smart key ECU assembly)

-

Harness or connector

-

Room Oscillator does not Recognize Key

Smart key system (for Start Function)

No. 1 indoor electrical key antenna (front floor)

-

No. 2 indoor electrical key antenna (rear floor)

-

Certification ECU (smart key ECU assembly)

-

Harness or connector

-

Electrical key transmitter sub-assembly

-

New Key cannot be Registered

Steering lock ECU (steering lock actuator or UPR bracket assembly)

Certification ECU (smart key ECU assembly)

-

Engine switch

-

Harness or connector

-

Additional Key cannot be Registered

Certification ECU (smart key ECU assembly)

Electrical key transmitter sub-assembly

-

Operation Check
OPERATION CHECK 1. CHECK SMART KEY SYSTEM (for Entry Function) OPERATION NOTICE: Make sure that the smart key system (for Entry Function) has not been canceled before performing this inspection. ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Smart key system (for entry function) data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a ma ...

Other materials:

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 check ...

Key Reminder Buzzer does not Sound
DESCRIPTION The key reminder warning buzzer sounds when the driver side door is opened while the ignition switch is in the LOCK or ACC positions. The key reminder warning buzzer is activated when the main body ECU (multiplex network body ECU) sends a key switch signal and driver side courtesy ...

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

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