Toyota Tundra. Manual — part 1138

Intake Air

Intake air
temperature:
Min.: -40°C,
Max.: 140°C

Equivalent to ambient
air temperature



If value -40°C (-40°F): sensor
circuit open



If value 140°C (284°F): sensor
circuit shorted

2nd Air
System Status

Secondary air
injection system
status:
ON or OFF

ON: Secondary air
system operation

-

Air-Fuel
Ratio

Air-fuel ratio:
Min.: 0, Max.:
1.999

0.8 to 1.2: Idling

-

Purge Destiny
Learn Value

Learning value of
purge density:
Min.: -50, Max.:
350

-35 to 1: Idling

Service data

Evap Purge
Flow

Purge flow:
Min.: 0%, Max.:
102.4%

0 to 100%: Idling

Service data

EVAP
(Purge) VSV

EVAP (Purge)
VSV control duty:
Min.: 0%, Max.:
100%

0 to 100%: Idling

Order signal from ECM

Vapor
Pressure
Pump

Vapor pressure:
Min.: 33.853 kPa,
Max.: 125.596
kPa

Approximately 100
kPa:
Ignition switch ON

EVAP system pressure monitored by
canister pressure sensor

Vapor
Pressure
(calculated)

Vapor pressure
(calculated):
Min.: -5.632 kPa,
Max.: 7153264
kPa

Approximately 100
kPa:
Ignition switch ON

EVAP system pressure monitored by
canister pressure sensor

Knock
Correct Learn
Value

Correction
learning value of
knocking:
Min: -64°CA,
Max.: 1984°CA

0 to 22°CA:
Driving at 44 mph (70
km/h)

Service data

Knock
Feedback
Value

Feedback value of
knocking:
Min: -64°CA,
Max.: 1984°CA

-22 to 0°CA:
Driving at 44 mph (70
km/h)

Service data

Clutch
Current

Clutch current:
Min.: 0 A, Max.:
2.49 A

-

-

Accelerator

Accelerator Pedal
Position (APP)
No. 1:

10 to 22%: Accelerator
pedal released 54 to
86%:

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2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Position No.1 Min.: 0%, Max.:

100%

Accelerator pedal fully
depressed

Accelerator
Position No.2

APP No. 2:
Min.: 0%, Max.:
100%

12 to 42%: Accelerator
pedal released
66 to 98%: Accelerator
pedal fully depressed

-

Accelerator
Position No.1

APP sensor No. 1
voltage:
Min.: 0 V, Max.:
4.98 V

-

-

Accelerator
Position No.2

APP sensor No. 2
voltage:
Min.: 0 V, Max.:
4.98 V

-

-

Accelerator
Position No.1

APP sensor No. 1
voltage:
Min.: 0 V, Max.: 5
V

0.5 to 1.1 V:
Accelerator pedal
released
2.6 to 4.5 V:
Accelerator pedal fully
depressed

-

Accelerator
Position No.2

APP sensor No. 2
voltage:
Min.: 0 V, Max.: 5
V

1.2 to 2.0 V:
Accelerator pedal
released
3.4 to 5.0 V:
Accelerator pedal fully
depressed

-

Accelerator
Idle Position

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

ON: Idling

-

Throttle Fully
Closed Learn

Throttle valve
fully closed
(learned value):
Min.: 0 V, Max.: 5
V

0.4 to 0.8 V

-

Accel Fully
Close #1 AD

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

-

ETCS service data

Accel Fully
Close Learn
#1

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

-

ETCS service data

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

deg.

Accel Fully
Close Learn
#2

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

-

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
released

-

System Guard

System guard:
ON or OFF

-

-

Open Side
Malfunction

Open side
malfunction:
ON or OFF

-

-

Throttle Pos.
Sensor Output

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



10 to 24%:
Throttle fully
closed



64 to 96%:
Throttle fully
open

Read 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.: 5
V

0.5 to 1.0 V: Idling

-

Throttle
Sensor
Position

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

0 to 10%: Idling

Calculated value based on VTA1

Throttle
Sensor

Absolute throttle
sensor positioning
#2:

-

Calculated value based on VTA2

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Position #2

Min.: 0%, Max.:
100%

Throttle
Position No.1

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

-

-

Throttle
Position No.2

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

-

-

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
Position No.2

Throttle position
No. 2:
Min.: 0 V, Max.: 5
V



2.0 to 2.9 V:
Throttle fully
closed



3.2 to 4.8 V:
Throttle fully
open

-

Throttle
Position
Command

Throttle position
command value:
Min.: 0 V, Max.:
4.9804 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.:
4.9804 V

0.6 to 1.0 V

ETCS service data

Throttle Sens
Open Pos #2

Throttle sensor
opener position
No. 2:
Min.: 0 V, Max.:
4.9804 V

2.0 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

Throttle actuator
current:

0 to 3.0 A: Idling

-

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra