Toyota Tundra. Manual — part 362

Fig. 135: Identifying Wireless Door Lock Buzzer Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Detach the claw and remove the buzzer.

INSTALLATION

1. INSTALL WIRELESS DOOR LOCK BUZZER

a. Attach the claw to install the buzzer.

Fig. 136: Identifying Wireless Door Lock Buzzer Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Connect the wireless door lock buzzer connector.

2. INSTALL FRONT END PANEL LH (See INSTALLATION )

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

2009 ACCESSORIES AND EQUIPMENT

Engine Immobilizer - Tundra

ENGINE IMMOBILIZER SYSTEM

PARTS LOCATION

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

Fig. 1: Identifying Location Of Engine Immobilizer System Components
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

Fig. 2: Engine Immobilizer System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DESCRIPTION

1. ENGINE IMMOBILIZER SYSTEM DESCRIPTION

The engine immobilizer system is designed to prevent the vehicle from being stolen. This system uses the
transponder key ECU that stores the key codes of authorized ignition keys. If an attempt is made to start
the engine using an unauthorized key, the ECU sends a signal to the ECM to prohibit fuel delivery and
ignition, effectively disabling the engine.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

2. FUNCTION OF MAIN COMPONENT

FUNCTION OF MAIN COMPONENT

3. SYSTEM FUNCTION

a. When the transponder key ECU detects that the unlock warning switch is ON, the transponder key

ECU provides current to the antenna coil and produces a faint electric wave. A transponder chip in
the key grip receives the electric wave. Upon receiving the electric wave, the transponder chip
outputs a key ID code signal. The transponder key coil receives this signal, the signal is amplified
by the transponder key amplifier, and the signal is transmitted to the transponder key ECU.

b. The transponder key ECU matches the key's ID code with the vehicle's ID code, which was

previously registered in the transponder key ECU, and communicates the results to the ECM. After
the identification results show that the key's ID code matches the vehicle's ID code and the
transponder key ECU has confirmed their match: 1) the engine immobilizer system is canceled and
the engine starting controls (fuel injection control and ignition control) enter standby mode; and 2)
the transponder key ECU transmits a security indicator light signal that communicates "indicator
OFF" to the accessory meter (security indicator light), and the security indicator light turns off.

c. The security indicator light pattern is as shown below (when changing from the immobilizer set

status to the unset status).

Fig. 3: Security Indicator Light Blinking Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Component

Outline

Transponder key

amplifier

When key is inserted into ignition key cylinder, antenna coil receives key code.
Then amplifier amplifies ID code and outputs it to transponder key ECU.

Unlock warning switch

Detects whether key is in ignition key cylinder and outputs results to transponder
key ECU.

Security indicator light

Depending on operation of transponder key ECU, security indicator light comes
on or starts blinking.

Front door courtesy

light switch LH

Located on front door LH. Detects door status (open or closed) and outputs data
to main body ECU. Turns on when door is open and turns off when door is
closed.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra