Toyota Tacoma 2015-2018 Service Manual: Problem Symptoms Table

Toyota Tacoma 2015-2018 Service Manual / Theft Deterrent / Theft Deterrent System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Troubleshooting of the theft deterrent system is based on the premise that the power door lock control system, wireless door lock control system*1 and smart key system*2 are operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the power door lock control system, wireless door lock control system*1 and smart key system*2 are operating normally.
- *1: w/ Wireless Door Lock System
- *2: w/ Smart Key System
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.

Theft Deterrent System

Symptom	Suspected Area	See page
Security indicator light does not illuminate when theft deterrent system is set by key linked operation, wireless operation1 or entry operation2.	Proceed to "Theft Deterrent System cannot be Set or Unset"
After doors are locked by key linked operation, wireless operation1 or entry operation2 while engine hood is open, theft deterrent system cannot be set by closing the engine hood.
Theft deterrent system cannot be unset by key link unlock, wireless door unlock1 or entry door unlock2.
Theft deterrent system unexpectedly sets itself.*1	Proceed to "Theft Deterrent System Unexpectedly Sets Itself"
Theft deterrent system cannot be unset by turning the engine on.	Proceed to "Theft Deterrent System is not Unset when Engine is Running"
While alarm is armed, battery is reconnected but alarm does not sound.	Proceed to "While Alarm is Armed, Battery is Reconnected but Alarm does not Sound"
While alarm is armed, engine hood opened but alarm does not sound.	Proceed to "While Alarm is Armed, Engine Hood is Opened but Alarm does not Sound"
Security indicator light does not operate.	Proceed to engine immobiliser system "Security Indicator Light Does not Blink"*2
Security indicator light does not operate.	Proceed to engine immobiliser system "Security Indicator Light Does not Blink"*3
Headlights, taillights or hazard warning lights do not flash while theft deterrent system is in warning operation.	Proceed to "Some Alarm Functions do not Operate"
Interior lights do not illuminate while theft deterrent system is in warning operation.
Vehicle horn do not sound while theft deterrent system is in warning operation.
Security horn do not sound while theft deterrent system is in warning operation.

*1: w/ Wireless Door Lock System
*2: w/ Smart Key System
*3: w/o Smart Key System

Diagnosis System

DIAGNOSIS SYSTEM 1. CHECK DLC3 (a) Check the DLC3 (See page ). 2. INSPECT BATTERY VOLTAGE (a) Measure the battery voltage. Standard Voltage: 11 to 14 V If the voltage is below 11 V, replace t ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION BLOCK (a) Disconnect the main body ECU (multiplex network body ECU) connectors. Text in Illustration ...

Other materials:

Installation
INSTALLATION PROCEDURE 1. INSTALL ROOF HEADLINING ASSEMBLY (a) Insert the roof headlining assembly into the vehicle from the front door RH side. NOTICE: Check that the corners of the roof headlining assembly are not folded, twisted or otherwise deformed and ...

Operation Check
OPERATION CHECK INPUT SIGNAL CHECK *a +RES *b -SET *c ON-OFF *d CANCEL (a) Connect the Techstream to the DLC3. (b) Check the cruise control main switch using the Data List functio ...

Open in Occupant Classification ECU Battery Positive Line (B1794)
DESCRIPTION DTC B1794 is set when a malfunction is detected in the occupant detection ECU. DTC No. DTC Detections Conditions Trouble Areas B1794 Occupant detection ECU circuit malfunction Occupant detection ECU malfuncti ...