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:

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for 2GR-FKS) 2. REMOVE PROPELLER SHAFT HEAT INSULATOR BRACKET SUB-ASSEMBLY (a) Remove the 2 bolts and propeller shaft heat insulator bracket. 3. REMOVE FRONT PROPELLER SHAFT ASSEMBLY (a) Place matchmarks on the propeller sh ...

Removal
REMOVAL PROCEDURE 1. TABLE OF BOLT, SCREW AND NUT HINT: All bolts, screws and nuts relevant to installing and removing the instrument panel are shown along with their alphabetic codes in the table below. 2. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be requ ...

Road Test
ROAD TEST 1. PROBLEM SYMPTOM CONFIRMATION (a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up or down, or that the shift point is too high or too low, conduct the following road test referring to t ...

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