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.
|
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 |
- |
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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:
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender ECU
Receiver ECU
Signal
Line
*1: for Vacuum Brake Booster
*2: for Hydraulic Brake Booster
Forward Recognition Camera
Combination Meter Assembly
...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is stored during the DTC check, inspect the trouble areas listed
for that code. For details of the code, refer to "See page" below.
Transponder Key ECU Assembly
DTC Code
Detection Item
See page
...
