Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: System Diagram

SYSTEM DIAGRAM

Component

Outline

Engine switch

  • Transponder key amplifier
  • Turns on the power and starts the engine.
  • Contains a built-in transponder key amplifier to start the engine when the key does not operate properly due to a depleted battery or wave interference.

Certification ECU (smart key ECU assembly)

  • Changes the power source mode by operating the ACC and IG relays.
  • Controls starting by operating the starter relay.
  • Performs key verification.
  • Controls the electrical key antenna (outside), electrical key antenna (indoor) and door lock/unlock sensor.
  • Outputs entry door lock/unlock commands.
  • Outputs steering lock ECU (steering lock actuator or upr bracket assembly) lock/unlock command signals.
  • Outputs immobiliser set/unset commands.
  • Forms the entry function detection area.
  • Records codes for smart verification.

ECM

  • Outputs a signal indicating that the engine has started to the certification ECU (smart key ECU assembly) when starting the engine.

Steering lock ECU (steering lock actuator or UPR bracket assembly)

  • Receives command signals from the certification ECU (smart key ECU assembly) and activates the steering lock ECU (steering lock actuator or UPR bracket assembly).
  • Records codes for smart verification.

Combination meter assembly

  • Operates various warnings (messages on the multi-information display, sounding of the buzzer in the combination meter, blinking or illumination of the smart warning light) according to the command signals from the certification ECU (smart key ECU assembly).
  • Displays information or operates LED when the smart key system has a malfunction.
  • Outputs a vehicle speed signal to the main body ECU (multiplex network body ECU).

IG, ACC relay

Turns on/off according to the certification ECU (smart key ECU) and provides power to each system.

Stop light switch assembly

Detects that the brake pedal has been depressed (switch is on) and outputs a signal to the certification ECU (smart key ECU assembly).

No. 1 indoor electrical key antenna assembly (front floor)

No. 2 indoor electrical key antenna assembly (rear floor)

Sends the request code from the certification ECU (smart key ECU assembly) and forms the vehicle interior detection area.

Electrical key and TPMS receiver assembly

Receives the smart key system code/wireless code sent from the key and sends it to the certification ECU (smart key ECU assembly).

Electrical key transmitter sub-assembly

Sends the ID code upon receiving a request signal.

Parts Location
PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the smart key system (for Start Function). *: Use the Techstream. PROCEDURE 1. VEHIC ...

Other materials:

Ptc Heater Relay
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT PTC HEATER RELAY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection C ...

Trailer towing
Your vehicle is designed primarily as a passenger-and-load-carrying vehicle. Towing a trailer can have an adverse impact on handling, performance, braking, durability, and fuel consumption. For your safety and the safety of others, you must not overload your vehicle or trailer. You must also e ...

Head restraints
Head restraints are provided for all seats. ■ Adjusting the head restraints Bench type front seat Up Pull the head restraints up. Down Push the head restraint down while pushing the lock release button. Separated type front seat Up Pull the head restraints up. Down Push th ...

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