Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: System Diagram

SYSTEM DIAGRAM

Circuit Description

Component

Outline

Steering Lock ECU (Steering Lock Actuator or UPR Bracket Assembly)

  • The steering is locked and unlocked by communicating with the certification ECU (smart key ECU assembly) via LIN communication.
  • When the following conditions are met, the steering can be unlocked.
    • The codes (L codes) of the certification ECU (smart key ECU assembly) and steering lock match.
    • The certification ECU (smart key ECU assembly) and key ID codes match.

Certification ECU (Smart Key ECU Assembly)

  • The ID code of the key the user is carrying is sent to the electrical key antenna.
  • The certification ECU (smart key ECU assembly) compares the key ID code it receives from the electrical key antenna with its own ID code. If they match, the certification ECU (smart key ECU assembly) permits the steering lock ECU (steering lock actuator or UPR bracket assembly) to turn the power on, start the engine and unlock and lock the steering.
  • Outputs a command to supply power to the steering lock motor based on the power source mode, shift position and vehicle speed signal.
System Description
SYSTEM DESCRIPTION 1. UNLOCK OPERATION CONDITIONS FOR STEERING LOCK (a) When the following condition is met, the unlock operation is performed. The engine switch is on (ACC) or on (IG). H ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedures to troubleshoot the steering lock system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT ...

Other materials:

Display does not Dim when Light Control Switch is Turned ON
PROCEDURE 1. CHECK IMAGE QUALITY SETTING (a) Display the "Display" screen. (b) Turn the light control switch to the tail or head position. (c) Check if "Day Mode" on the display adjustment screen is on. OK: "Day Mode" setting is of ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for both the RH and LH sides. The procedure described below is for the LH side. PROCEDURE 1. INSTALL FRONT SHOULDER BELT ANCHOR ADJUSTER ASSEMBLY (a) As shown in the illustration, engage the 2 guides ...

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