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:

Installation
INSTALLATION PROCEDURE 1. INSTALL FRONT CONSOLE BOX (for Automatic Transmission) (a) When installing a new front console box: Text in Illustration *a Runner Portion *b Cut Off (1) Usin ...

Steering Angle Sensor Initialization Incomplete (C1439,C1445)
DESCRIPTION The skid control ECU (master cylinder solenoid) acquires steering angle sensor (spiral cable with sensor sub-assembly) zero point every time the ignition switch is turned to ON and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores t ...

Parking Brake Lever
Components COMPONENTS ILLUSTRATION ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL PARKING BRAKE SWITCH ASSEMBLY 2. INSTALL PARKING BRAKE LEVER SUB-ASSEMBLY (a) Install the 2 toothed washers and parking brake lever support to the parking brake lever. (b) Install th ...

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