Toyota Tundra. Manual — part 322

Fig. 2: Identifying Location Of Power Door Lock Control System Components (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 3: Power Door Lock Control System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Communication table:

COMMUNICATION TABLE

SYSTEM DESCRIPTION

1. POWER DOOR LOCK CONTROL SYSTEM DESCRIPTION

a. The power door lock system locks/unlocks all the doors. The master switch and the door control

Sender

Receiver

Signal

Line

ECM

Main Body ECU

Park/Neutral Position Switch

CAN

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

switch on the passenger door send lock/unlock request signals to the main body ECU. Then, the
main body ECU sends these request signals to the lock motors in each door to lock/unlock all the
doors at once in response to the inputs. Operating the driver's door lock using a mechanical key
sends lock/unlock request signals to the main body ECU via the master switch. "2-step unlock
function" is optional for the key-linked lock of the driver side door.

2. FUNCTION OF MAIN COMPONENT

FUNCTION OF MAIN COMPONENT

3. SYSTEM FUNCTION

HINT:

The following functions' default settings are ON. Some of these functions can be customized (see
CUSTOMIZE PARAMETERS ).

a. This system is controlled by the main body ECU. The main body ECU outputs signals to each door

lock motor. The door lock control system in the vehicle has the following functions:

DOOR LOCK FUNCTION CHART

Components

Function

Power Window

Regulator Master

Switch

Door control switch on master switch lock/unlocks all doors.

Door Control Switch Door control switch on passenger side door locks/unlocks all doors.
Door Courtesy Light

Switch

Placed on each door. 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.

Front Door Lock

Motor



Motor locks/unlocks door.



Built-in door key lock and unlock switch (key-linked) detects door key
operation's door status (locked or unlocked) and outputs data to main body
ECU.



Built-in detection switch detects door status (locked or unlocked) and
outputs data to main body ECU. This switch turns off when door is locked
and turns on when door is unlocked.

Rear Door Lock Motor



Motor locks/unlocks door.



Built-in detection switch detects door status (locked or unlocked) and
outputs data to main body ECU. This switch turns off when door is locked
and turns on when door is unlocked.

Function

Outline

Manual Lock and

Unlock Function

Lock / unlocks all doors by door control switch's lock operation (manual
operation).

One-motion Open

When the door is locked, this function enables the door to be unlocked by
merely pulling the inside handle lever of the door.

Key-linked Lock

This function, which is linked with the key cylinder, can lock all the doors

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:



Use the following procedures to troubleshoot the power door lock control system.



*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

2. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11V, recharge or replace the battery before proceeding.

3. PROBLEM SYMPTOMS TABLE

Result

RESULT REFERENCE

B: Go to step 5

A: Go to next step

4. OVERALL ANALYSIS AND TROUBLESHOOTING*

a. See OPERATION CHECK

b. See TERMINALS OF ECU

c. See DATA LIST / ACTIVE TEST

5. REPAIR OR REPLACE

6. CONFIRMATION TEST

NEXT: END

OPERATION CHECK

when a lock operation is effected.

Key Lock-in

Prevention

When the key is in the ignition key cylinder and a door lock operation is
performed while the driver's door is open, all the doors will be unlocked.

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra