Toyota Tundra. Manual — part 336

Fig. 51: Identifying Wireless Door Lock Control System Components Location (5 Of 5)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 52: Wireless Door Lock Control System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Communication table:

WIRELESS DOOR LOCK CONTROL SYSTEM COMMUNICATION TABLE

Sender

Receiver

Signal

Line

Main body ECU

Outer mirror control ECU*

Door mirror foot light illumination signal

CAN

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

SYSTEM DESCRIPTION

1. WIRELESS DOOR CONTROL SYSTEM DESCRIPTION

a. This system locks and unlocks the vehicle's doors remotely. The wireless control system has the

following features:



The door control receiver performs the code identification procedure and the main body ECU
operates the door lock control. A serial data link is provided for communication between the
receiver and main body ECU.



A key-holder type transmitter is used and it contains the following 3 switches: the door lock
switch, door unlock switch and panic alarm switch.

2. FUNCTION OF MAIN COMPONENTS

WIRELESS DOOR CONTROL SYSTEM FUNCTION OF MAIN COMPONENTS

3. SYSTEM FUNCTION

a. The wireless door lock control system has the following functions.

WIRELESS DOOR LOCK CONTROL FUNCTION CHART

HINT:
*: except Extended Type

Components

Functions

Door control transmitter



Contains LOCK, UNLOCK and PANIC switches.



Transmits weak electric waves (recognition codes and function codes)
to door control receiver.

Door control receiver

Receives weak electric waves (recognition codes and function codes) from
door control transmitter, and changes waves to code data.

Door lock (door unlock

detection switch)

Transmits door lock conditions of each door to main body ECU.

Unlock warning switch

Detects if key is in ignition key cylinder.

Front door courtesy light

switch

Turns ON when door is open and turns OFF when door is closed. Outputs
door status (open or closed) to main body ECU.

Rear door courtesy light

switch*1, *2

Turns ON when door is open and turns OFF when door is closed. Outputs
door status (open or closed) to main body ECU.

Wireless door lock buzzer

Emits beep (answer-back) when doors are locked or unlocked by wireless
operation.

HINT:



*1: for Double Cab



*2: for CrewMax

Function

Outline

All door lock function Pressing LOCK switch locks all doors.

Only driver side door

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:



The wireless door lock control system troubleshooting procedures are based on the premise that the
power door lock system is operating normally. Check the power door lock system first before

unlock operation

function

Pressing UNLOCK switch once unlocks only driver side door.

All door unlock

operation (2 step unlock

operation) function

Pressing UNLOCK switch twice within 3 seconds unlocks all doors after
driver side door is unlocked.

Answer-back function



Hazard warning lights and door mirror turn indicators flash once
when doors are locked, and flash twice when doors are unlocked
to indicate that operation has been completed.



Wireless door lock buzzer sounds once when doors are locked,
and sounds twice when doors are unlocked to inform that
operation has been completed.

Automatic locking

function

If no doors are opened within 30 seconds after being unlocked by
wireless transmitter, all doors are locked again automatically.

Door ajar warning

function

If any door is open or ajar, pressing LOCK switch will cause wireless
door lock buzzer to sound for about 10 seconds.

Illuminated entry

function

If locked doors are unlocked through wireless operation, ignition key
cylinder light, map light, room light, foot light and door mirror foot
light* illuminate. If one of following situations occurs, lights fade out:



Within 15 seconds, doors are not opened and doors are locked
through wireless operation.



Within 15 seconds, key is inserted into ignition key cylinder and
ignition switch is turned ACC or ON.



No operations or actions are performed within 15 seconds.

Panic function

Holding down PANIC switch for more than 1 second sounds security
horn and vehicle horns, blinks hazard warning lights, headlights,
taillights and door mirror turn indicators, and illuminates map light and
room light.

Security function

Sends signal as rolling code.

Transmitter recognition

code registration

function

Enables 4 modes for registering (writing and storing) transmitter
recognition codes in EEPROM built into door control receiver.

HINT:



With no key in the ignition key cylinder (unlock warning switch is OFF) and all door
courtesy light switches OFF, pressing the door control transmitter's LOCK / UNLOCK
switch causes the transmitter to output weak electrical waves to the door control receiver.



*:except Extended Type

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra