Toyota Tundra. Manual — part 273

DTC COMBINATION REFERENCE



[]: Communication error status is memorized, (e.g., 1 wire disconnection)



*1: Only during failure status.

Output

from

Output

DTC

Detection Item

Detected Communication Stop Mode

MS Bus

Front Power
Seat Control

ECU and

Switch LH

Communication

Stop Mode

Outer Mirror

Control ECU

Communication

Stop Mode

Multiplex Tilt

and Telescopic

ECU

Communication

Stop Mode

Main Bod

ECU

Communica

Stop Mod

Multiplex
Tilt and
Telescopic
ECU

B2621

Communication

Interruption

o

-

o

o

Main Body
ECU

U1002

Lost

Communication

with Gateway

Module

-

-

-

o

U0208

Lost

Communication

with "Seat

Control Module

A"

o

-

-

o

U0199

Lost

Communication

with "Door

Control Module

A"

-

o

-

o

U1115

Lost

Communication

with Tilt and

Telescopic

Module

-

-

o

o

ECM

U0101

Lost

Communication

with TCM

-

-

-

-

U0073

Control Module
Communication

Bus OFF

-

-

-

-

U0100

Lost

Communication

with

ECM/PCM "A"

-

-

-

-

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

FAIL-SAFE TABLE

1. FAIL-SAFE FUNCTION

a. When communication fails in any of the main wires (communication lines) due to a short circuit or

other causes, the fail-safe function, which is specified for each system, operates to prevent the
system from malfunctioning.

b. The table below shows the effects on each system when communication is impossible. For further

details, refer to each system.

Skid Control
ECU with
Actuator

U0114

Lost

Communication

with 4-Wheel

Drive Clutch

Control Module

-

-

-

-

U0123

Lost

Communication

with Yaw Rate

Sensor Module

-

-

-

-

U0124

Deceleration

Sensor

Communication

Circuit

Malfunction

-

-

-

-

U0126

Lost

Communication

with Steering
Angle Sensor

Module

-

-

-

-

Combination
Meter ECU

U0100

Lost

Communication

with

ECM/PCM "A"

-

-

-

-

U0129

Lost

Communication

with Brake

System Control

Module

-

-

-

-

Air
Conditioning
Amplifier

B1499*1

Multiplex

Communication

Circuit

-

-

-

-

HINT:



o: DTC is memorized.



[]: Communication error status is memorized, (e.g., 1 wire disconnection)



*1: Only during failure status.

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

FAIL-SAFE TABLE

Function

(Function

Description)

Control

Master

ECU

Related ECU or

Sensor

Vehicle

Behavior

Indicator and

Buzzer

Memory
(Driver Seat,
Mirror, Tilt and
Telescopic)

Front Power

Seat Control

ECU and

Switch LH



Outer Mirror

Control

ECU



Multiplex

Tilt and

Telescopic

ECU



Main Body

ECU



ECM



Combination

Meter ECU

Stop memory

function

Nothing

Retractable
Mirror

Outer Mirror

Control

ECU

Main Body ECU

Stop

Retractable

function

Nothing

Door Mirror
Foot Light

Outer Mirror

Control

ECU

Main Body ECU

Stop door

mirror foot

light function

Nothing

Tilt and
Telescopic:
Auto Away/
Return

Multiplex

Tilt and

Telescopic

ECU



Front Power

Seat Control

ECU and

Switch LH



Main Body

ECU

Stop auto

away/ return

function

Nothing

Alarm

Main Body

ECU

Bus Buffer ECU

Not influenced

Nothing

Door Lock
Linked Speed

Main Body

ECU



Combination

Meter ECU



Bus Buffer

ECU

Not possible to

link with speed

or shift

Nothing

Illumination

Main Body

ECU

Combination

Meter ECU

Change status

of illumination

Nothing

Cargo Light

Main Body

ECU

Bus Buffer ECU

Not influenced

Nothing

Power Window Main Body

ECU

Bus Buffer ECU

Not influenced

Nothing

DRL

Main Body

ECU

ECM

DRL does not

illuminate

Nothing



Front Power

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Observation
Function of MS
Bus
Communication
Failure

Main Body

ECU

Seat Control

ECU and

Switch LH



Outer Mirror

Control

ECU



Multiplex

Tilt and

Telescopic

ECU

Not influenced

Nothing

Engine Control

ECM

-

Not influenced

Light on

"MIL"

(1)

Normal Brake

Skid Control

ECU with

Actuator

-

Not influenced

Nothing

ABS, VSC

Skid Control

ECU with

Actuator



4WD

Control

ECU



ECM



Steering

Angle

Sensor



Yaw Rate

Sensor



Stop

VSC

operation



Stop

traction

control



Light on

"VSC

Warning

Light"



Light on

"Slip

Indicator

Light"

Meter Buzzer
Function

Combination

Meter ECU



Main Body

ECU



ECM



Skid Control

ECU with

Actuator



Center

Airbag

Stop some

buzzer function



Stop

"Key

Reminder

Buzzer"



Stop

"Seat

Belt

Warning

Buzzer"



Stop

"Parking

Brake

ON

Drive

Warning

Buzzer"



Stop

"Half-

open

Warning

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra