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:

Inspection
INSPECTION PROCEDURE 1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY (a) Check the LO operation. Text in Illustration *a Component without harness connected (Windshield Wiper Motor Assembly) (1) Apply battery voltage to the windshield wiper motor connector and ch ...

Acceleration Sensor Malfunction (C1420)
DESCRIPTION Refer to DTCs C1419 and C1435 (See page ). DTC Code DTC Detection Condition Trouble Area C1420 After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or m ...

Brake Signal Malfunction (B2284)
DESCRIPTION This DTC is stored when the brake signal sent via direct line and the brake signal sent via CAN communication do not match. HINT: When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the ca ...