Toyota Tacoma (2015-2018) Service Manual: Theft Deterrent System is not Unset when Engine is Running

Toyota Tacoma (2015-2018) Service Manual / Theft Deterrent / Theft Deterrent System / Theft Deterrent System is not Unset when Engine is Running

DESCRIPTION

The theft deterrent system is unset when the IG signal and engine speed signal are input to the main body ECU (multiplex network body ECU) for 2 seconds or more continuously.

The engine speed signal is sent from the ECM to the main body ECU (multiplex network body ECU). For this reason, if there is an abnormality in an ECU or wire harness, the system may not function correctly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration (See page ).*1
- *1: w/ Smart Key System
Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new one (See page ).

END

Theft Deterrent System cannot be Set or Unset

DESCRIPTION When the ignition switch is turned off and all doors and the engine hood are closed, the theft deterrent system is set when doors are locked by wireless operation*1, key linked operat ...

Theft Deterrent System Unexpectedly Sets Itself

DESCRIPTION A situation in which the theft deterrent system unexpectedly sets itself can be caused when the main body ECU (multiplex network body ECU) cannot detect whether a door is open or clos ...

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 sy ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK FOR TRANSPONDER KEY ECU ASSEMBLY DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Immobiliser / Trouble Codes. (e) Check the details of the DTC(s) (See page ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the C27 and C29 certification ECU (smart key ECU assembly) connectors. (b) Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side w ...