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-...
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