Toyota Tundra. Manual — part 274

Sensor

Buzzer"



Stop

"4WD

Buzzer"



Stop

"Slide

Roof

Buzzer"



Stop

"Sports

Shift

Reject

Buzzer"

Meter Indicator
Function

Combination

Meter ECU



Main Body

ECU



ECM



Skid Control

ECU



Center

Airbag
Sensor



4WD

Control

ECU

Does not

illuminate or

always

illuminates



Light on

"Airbag

Warning

Light"



Light on

"BRAKE

Warning

Light"



Light on

"ABS

Warning

Light"

Data Recorder

Center

Airbag

Sensor



ECM



Combination

Meter ECU

Stop recording

Light on "ABS

Warning Light"

A/C

Air

Conditioning

Amplifier



Main Body

ECU



ECM



Combination

Meter ECU

Stop air

conditioner

Nothing

Remote Start

Bus Buffer

ECU

Main Body ECU Not possible to

control by

wireless

Nothing

4WD

4WD

Control

ECU



ECM



Skid Control

ECU with

Actuator



Combination

Meter ECU



Air

Not possible to

change

between 4WD

and 2WD

Nothing

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

DIAGNOSTIC TROUBLE CODE TABLE

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of
the code, refer to the table below.

CAN communication system:

DIAGNOSTIC TROUBLE CODE TABLE - CAN COMMUNICATION SYSTEM

Conditioning

Amplifier

(1)

MIL lights on only during VSC or ABS failure status.

DTC Code

Detection Item

Trouble Area

U0199

Lost Communication with "Door
Control Module A"



Power source circuit of
outer mirror control ECU



Outer mirror control ECU



Outer mirror control ECU
branch wire or connector

U0208

Lost Communication with "Seat
Control Module A"



Power source circuit of front
power seat control ECU and
switch LH



Front power seat control
ECU and switch LH



Front power seat control
ECU and switch LH branch
wire or connector

U1002

Lost Communication with
Gateway Module



MS bus circuit



Outer mirror control ECU
branch wire or connector



Front power seat control
ECU and switch LH branch
wire or connector



Multiplex tilt and telescopic
ECU branch wire or
connector



Main body ECU main wire
or connector



Combination meter ECU
main wire or connector



Outer mirror control ECU

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

DTC U0199: LOST COMMUNICATION WITH "DOOR CONTROL MODULE A"

DESCRIPTION

DTC DETECTION CONDITION AND TROUBLE AREA

WIRING DIAGRAM



Front power seat control
ECU and switch LH



Multiplex tilt and telescopic
ECU



Main body ECU



Combination meter ECU



No. 3 junction connector

U1115

Lost Communication with Tilt and
Telescopic Module



Power source circuit of
multiplex tilt and telescopic
ECU



Multiplex tilt and telescopic
ECU



Multiplex tilt and telescopic
ECU branch wire or
connector

DTC Code

DTC Detection Condition

Trouble Area

U0199

No communication from outer
mirror control ECU



Power source circuit of
outer mirror control ECU



Outer mirror control ECU



Outer mirror control ECU
branch wire or connector

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 30: Identifying Lost Communication With "Door Control Module A" - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

a. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the

main wire and the branch wire.

2. CHECK FOR OPEN IN CAN BUS WIRE (OUTER MIRROR CONTROL ECU BRANCH WIRE)

a. Disconnect the N8 outer mirror control ECU connector.

b. Measure the resistance according to the value(s) in the table below.

CAUTION: Wait at least 90 seconds after disconnecting the cable from the

negative (-) battery terminal to prevent airbag and seat belt
pretensioner activation.

NOTE:

After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra