Toyota Tundra. Manual — part 1313

Position No.2

Min.: 0 V, Max.:
5 V

3.4 to 5.3 V:
accelerator pedal is
fully depressed

Accelerator Idle
Position

Whether or not
accelerator
pedal position
sensor detecting
idle/
ON or OFF

ON: Idling

-

Throttle Fully
Close Learn

Throttle valve
fully closed
(learned value)

0.4 to 0.8 V

-

Accel Fully
Close #1 (AD)

Accelerator
fully closed
value No. 1
(AD)/
Min.: 0, Max.:
4.98 V

-

ETCS service data

Accel Fully
Close Learn #1

Accelerator
fully closed
learning value
No. 1/
Min.: 0, Max.:
124.512

-

ETCS service data

Accel Fully
Close Learn #2

Accelerator
fully closed
learning value
No. 2/
Min.: 0, Max.:
124.512

-

ETCS service data

Fail Safe Drive

Whether or not
fail-safe
function
executed/
ON or OFF

ON: ETCS has failed

-

Fail Safe Drive
(Main CPU)

Whether or not
fail-safe
function
executed/
ON or OFF

ON: ETCS has failed

-

ST1

Brake pedal
signal/
ON or OFF

ON: Brake pedal
depressed

-

System Guard

System guard/
ON or OFF

-

ETCS service data

Open Side

Open side

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Malfunction

malfunction/
ON or OFF

-

ETCS service data

Throttle
Position

Absolute throttle
position sensor/
Min.: 0%, Max.:
100%



10 to 24%:
Throttle fully
closed



64 to 96%:
Throttle fully
open

Read the value with intrusive operation
(Active Test)

Throttle Idle
Position

Whether or not
throttle position
sensor detecting
idle/
ON or OFF

ON: Idling

-

Throttle
Require
Position

Throttle
requirement
position/
Min.: 0 V, Max.:
5V

0.5 to 1.0 V: Idling

-

Throttle Sensor
Position

Throttle sensor
positioning/
Min.: 0%, Max.:
100%

10 to 18%: Idling

Calculated value based on VTA1

Throttle Sensor
Position #2

Throttle sensor
positioning #2/
Min.: 0%, Max.:
100%

-

Calculated value based on VTA2

Throttle
Position No.1

Throttle position
sensor No. 1
output voltage/
Min.: 0 V, Max.:
4.9 V

-

ETCS freeze data

Throttle
Position No.2

Throttle position
sensor No. 2
output voltage/
Min.: 0 V, Max.:
4.9 V

-

ETCS freeze data

Throttle
Position No.1

Throttle position
No. 1/
Min.: 0 V, Max.:
5 V



0.5 to 1.2 V:
Throttle fully
closed



3.2 to 4.8 V:
Throttle fully
open

-

Throttle

Throttle position
No. 2/



2.0 to 2.9 V:
Throttle fully
closed

Read the value with intrusive operation

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Position No.2

Min.: 0 V, Max.:
5 V



4.6 to 5.5 V:
Throttle fully
open

(Active Test)

Throttle
Position
Command

Throttle position
command value/
Min.: 0 V, Max.:
4.98 V

0.5 to 4.8 V

ETCS service data

Throttle Sens
Open Pos #1

Throttle sensor
opener position
No. 1/
Min.: 0 V, Max.:
4.98 V

0.6 to 0.9 V

ETCS service data

Throttle Sens
Open Pos #2

Throttle sensor
opener position
No. 2/
Min.: 0 V, Max.:
4.98 V

2.2 to 2.6 V

ETCS service data

Throttle Sens
Open #1 (AD)

Throttle sensor
opener position
No. 1 (AD)/
Min.: 0 V, Max.:
4.98 V

0.6 to 0.9 V

ETCS service data

Throttle Motor

Whether or not
throttle actuator
control
permitted/
ON or OFF

ON: Idling

Read the value with the ignition switch
ON (Do not start engine)

Throttle Motor
Current

Throttle actuator
current/
Min.: 0 A, Max.:
19.9 A

0 to 3.0 A: Idling

-

Throttle Motor

Throttle
actuator/
Min.: 0%, Max.:
100%

0.5 to 40%: Idling

-

Throttle Motor
Current

Throttle actuator
current/
Min.: 0 A, Max.:
19.92 A

0 to 3.0 A: Idling

-

Throttle Motor
Open Duty

Throttle actuator
opening duty
ratio/
Min.: 0%, Max.:
100%

0 to 40%: During
idling

When accelerator pedal depressed, duty
ratio increased

Throttle actuator
closed duty

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Throttle Motor
Close Duty

ratio/
Min.: 0%, Max.:
100%

0 to 40%: During
idling

When accelerator pedal released quickly,
duty ratio increased

Throttle Motor
Duty (Open)

Throttle actuator
duty ratio
(open)/
Min.: 0%, Max.:
100%

-

ETCS service data

Throttle Motor
Duty (Close)

Throttle actuator
duty ratio
(close)/
Min.: 0%, Max.:
100%

-

ETCS service data

O2S B1 S2

Heated oxygen
sensor output
voltage for bank
1 sensor 2/
Min.: 0 V, Max.:
1.275 V

0.1 to 0.9 V:
Driving 44 mph (70
km/h)

Performing the Control the Injection
Volume or Control the Injection Volume
for A/F Sensor function of the Active Test
enables the technician to check voltage
output of the sensor

O2S B2 S2

Heated oxygen
sensor output
voltage for bank
2 sensor 2/
Min.: 0 V, Max.:
1.275 V

0.1 to 0.9 V:
Driving 44 mph (70
km/h)

Performing the Control the Injection
Volume or Control the Injection Volume
for A/F Sensor function of the Active Test
enables the technician to check voltage
output of the sensor

AFS B1 S1

Air fuel ratio
sensor output
voltage for bank
1 sensor 1/
Min.: 0 V, Max.:
7.999 V

2.8 to 3.8 V: Idling

Performing the Control the Injection
Volume or Control the Injection Volume
for A/F Sensor function of the Active Test
enables the technician to check voltage
output of the sensor

AFS B2 S1

Air fuel ratio
sensor output
voltage for bank
2 sensor 1/
Min.: 0 V, Max.:
7.999 V

2.8 to 3.8 V: Idling

Performing the Control the Injection
Volume or Control the Injection Volume
for A/F Sensor function of the Active Test
enables the technician to check voltage
output of the sensor

AFS B2 S1

Air fuel ratio
sensor current
for bank 2
sensor 1/
Min.: -128 mA,
Max.: 127.99
mA

-0.5 to 0.5 mA:
Idling

Performing Control the Injection Volume
or Control the Injection Volume for A/F
Sensor function of Active Test enables
technician to check output current of
sensor

Total fuel trim
of bank 1
Average value

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra