Toyota Tundra (2015 year). Manual - part 2678

FUNCTION

BEHAVIOR DURING CAN FAILURE

CONTROL

MASTER

1. 

SYSTEM

RELATED

2. 

VEHICLE BEHAVIOR

INDICATOR AND

BUZZER

DIAGNOSTIC

TROUBLE CODE

Defogger Control

(Performs defogger

control.)

Air

conditioning

amplifier

assembly

1. 

Combination

meter

assembly

2. 

When there is not a

periodic malfunction,

cannot perform defogger

control.

When there is a periodic

malfunction, the previous

value is maintained.

Nothing

Nothing

A/C Control/Correction

Using Vehicle Speed

(A/C control is

performed according to

the vehicle speed.)

Air

conditioning

amplifier

assembly

1. 

Combination

meter

assembly

2. 

When there is not a

periodic malfunction:

Performs

control with

vehicle speed

as 0 km/h (0

mph).

Cannot

perform

correction

using vehicle

speed.

When there is a periodic

malfunction, the previous

value is maintained.

Nothing

Nothing

Temperature Unit of

Measurement

(Determines the unit of

measurement for the

temperature.)

Air

conditioning

amplifier

assembly

1. 

Combination

meter

assembly

2. 

When there is not a

periodic malfunction, the

When there is a periodic

malfunction, the previous

value is maintained.

Nothing

Nothing

Memory Seat

(Memorizes and recalls

the seat position.)

Front power

seat control

ECU and

switch LH

1. 

ECM, Main

body ECU

(driver side

junction

block

assembly),

Outer mirror

control ECU

assembly,

Multiplex tilt

and

telescopic

ECU

2. 

If communication is lost

with the ECM:

The position is

not recalled

when ignition

switch is

turned to ON.

The position

cannot be

memorized or

recalled.

If communication is lost

with the main body ECU

or outer mirror control

ECU assembly: The

position cannot be

Nothing

Nothing

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: FAIL-...

FUNCTION

BEHAVIOR DURING CAN FAILURE

CONTROL

MASTER

1. 

SYSTEM

RELATED

2. 

VEHICLE BEHAVIOR

INDICATOR AND

BUZZER

DIAGNOSTIC

TROUBLE CODE

memorized or recalled.

If communication is lost

with the multiplex tilt and

telescopic ECU: The tilt

position cannot be

memorized or recalled.

2WD-4WD LOW

Switching Limitation and

4WD-4WD LOW

Switching Limitation

(When there is a wheel

speed signal

malfunction, 2WD-4WD

LOW and 4WD

HIGH-4WD LOW

switching are

prohibited.)

4WD control

ECU

1. 

Brake

actuator

assembly

(skid control

ECU)

2. 

2WD-4WD HIGH and 4WD

HIGH-4WD LOW switching are

prohibited.

4HI and 4LO indicator

light blinks

U0122

High-Low Switching

Limitation

(When there is a vehicle

speed/automatic

transmission signal

malfunction, High-Low

switching is prohibited.)

4WD control

ECU

1. 

ECM, Brake

actuator

assembly

(skid control

ECU)

2. 

2WD-4WD HIGH and 4WD

HIGH-4WD LOW switching are

prohibited.

4HI and 4LO indicator

light blinks

U0100

U0122

Engine ON/OFF

Judgment

(Changes control when

engine is ON/OFF

according to the engine

speed.)

4WD control

ECU

1. 

ECM

2. 

4WD HIGH-4WD LOW switching are

prohibited.

4HI and 4LO indicator

light blinks

U0100

Shift Position Judgment

4WD control

ECU

1. 

ECM

2. 

4WD HIGH-4WD LOW switching are

prohibited.

4HI and 4LO indicator

light blinks

U0100

Indicator and Buzzer

Signal Output

(Outputs a signal

indicating the state of

the indicators and

buzzers, which

represents the actuator

position and switching

status.)

4WD control

ECU

1. 

-

2. 

Cannot update the indicator and

buzzer signals, as signal cannot be

transmitted.

Cannot update the

indicator and buzzer

signals, as signal

cannot be transmitted.

Nothing

Electrical Load Control

(Performs idle up

according to the

electrical load.)

ECM

1. 

Main body

ECU (driver

side junction

block

2. 

Idle up according to the electrical

load is not performed.

The idling speed

changes.

Nothing

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: FAIL-...

FUNCTION

BEHAVIOR DURING CAN FAILURE

CONTROL

MASTER

1. 

SYSTEM

RELATED

2. 

VEHICLE BEHAVIOR

INDICATOR AND

BUZZER

DIAGNOSTIC

TROUBLE CODE

assembly),

Air

conditioning

amplifier

assembly

Air Conditioning-linked

Control

(Performs idle up

according to the

compressor load.

Performs air

conditioning cut

control.)

ECM

1. 

Air

conditioning

amplifier

assembly

2. 

Air conditioning-linked control does

not operate.

Air conditioning does

not operate.

Nothing

Charging Control

(Performs idle up

according to charging

requests.)

ECM

1. 

Main body

ECU (driver

side junction

block

assembly),

Air

conditioning

amplifier

assembly

2. 

Idle up according to charging

requests is not performed.

Idle up according to

charging requests is

not performed.

Nothing

Integrated Control

(Estimates the driver

requested torque based

on the accelerator pedal

operation and performs

torque characteristic

control according to

driving conditions so

that drivability,

acceleration

performance and

acceleration feeling are

improved.)

ECM

1. 

Brake

actuator

assembly

(skid control

ECU),

Steering

angle sensor

2. 

Does not estimate the driver

requested torque based on the

accelerator pedal operation and

does not perform torque

characteristic control according to

driving conditions and as a result,

drivability, acceleration performance

and acceleration feeling are not

improved.

Does not estimate the

driver requested

torque based on the

accelerator pedal

operation and does not

perform torque

characteristic control

according to driving

conditions and as a

result, drivability,

acceleration

performance and

acceleration feeling

are not improved.

Nothing

ECT System Indicator

(Displays shift, switch

and mode information

to the meter.)

ECM

1. 

Main body

ECU (driver

side junction

block

assembly)

2. 

Nothing

ECT system indicators

do not illuminate.

Nothing

AI-SHIFT Control

(Controls the automatic

transmission in order to

improve engine braking

power and acceleration

ECM

1. 

Brake

actuator

assembly

(skid control

2. 

AI-SHIFT control does not operate.

AI-SHIFT control does

not operate.

Nothing

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: FAIL-...

FUNCTION

BEHAVIOR DURING CAN FAILURE

CONTROL

MASTER

1. 

SYSTEM

RELATED

2. 

VEHICLE BEHAVIOR

INDICATOR AND

BUZZER

DIAGNOSTIC

TROUBLE CODE

feel.)

ECU), Radio

and display

receiver

assembly,

Navigation

receiver

assembly

Coast Downshift/Heater

Requested Upshift Delay

(Changes the coast

downshift point based

on the air conditioning

load. Performs heater

requested upshift

delay.)

ECM

1. 

Air

conditioning

amplifier

assembly

2. 

Coast downshift does not operate.

Coast downshift shock

becomes stronger.

Nothing

Cruise Control

(Adjusts the engine

throttle valve opening

amount automatically to

control the vehicle.)

ECM

1. 

Brake

actuator

assembly

(skid control

ECU),

Combination

meter

assembly

2. 

Cruise control is not performed.

When

transmission

is lost: The

cruise main

indicator

light does

not

illuminate.

When

reception is

lost: Cruise

control is

not

performed.

Nothing

Engine Control

(Performs fuel supply

analysis and alcohol

concentration learning.)

ECM

1. 

Combination

meter

assembly

2. 

Alcohol concentration learning is not

performed.

Drivability worsens

and the engine may

stall due to the delay

U0155

ABS control

(Monitors for tire

slippage and performs

fluid pressure control to

prevent the wheels from

locking up in order to

maintain vehicle

stability and vehicle

body deceleration.)

Brake

actuator

assembly

(skid control

ECU)

1. 

4WD control

ECU

2. 

The ABS does not operate.

ABS warning light

turns on.

U0073

MSR control

(Prevents the tires from

slipping due to engine

drag torque by

increasing engine

Brake

actuator

assembly

(skid control

ECU)

1. 

MSR does not operate.

Light turns on.

U0073

U0100

U0114

U0123

U0126

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: FAIL-...