Toyota Tundra. Manual — part 1489

S1
AFS Current B2
S1

A/F sensor current

-

O2S B1 S2
O2S B2 S2

Heated oxygen sensor output

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

Short FT #1

Short-term fuel trim

Short-term fuel compensation used to maintain air-
fuel ratio at stoichiometric air-fuel ratio.

Long FT #1

Long-term fuel trim

Overall fuel compensation carried out in long-term
to compensate a continual deviation of short-term
fuel trim from central value.

Total FT #1

Total fuel trim

-

Short FT #2

Short-term fuel trim

Short-term fuel compensation used to maintain air-
fuel ratio at stoichiometric air-fuel ratio.

Long FT #2

Long-term fuel trim

Overall fuel compensation carried out in long-term
to compensate a continual deviation of short-term
fuel trim from central value.

Total FT #2

Total fuel trim

-

Fuel System
Status #1

Fuel system status (for Bank 1)



OL (Open Loop): Has not yet satisfied
conditions to go closed loop.



CL (Closed Loop): Using heated oxygen
sensor as feedback for fuel control.



OL Drive: Open loop due to driving
conditions (fuel enrichment).



OL Fault: Open loop due to detected system
fault.



CL Fault: Closed loop but heated oxygen
sensor, which used for fuel control,
malfunctioning.

Fuel System
Status #2

Fuel system status (for Bank 2)



OL (Open Loop): Has not yet satisfied
conditions to go closed loop.



CL (Closed Loop): Using heated oxygen
sensor as feedback for fuel control.



OL Drive: Open loop due to driving
conditions (fuel enrichment).



OL Fault: Open loop due to detected system
fault.



CL Fault: Closed loop but heated oxygen
sensor, which used for fuel control,
malfunctioning.

Secondary Air
Control VSV

Secondary air injection system
status

-

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

2nd Air System
Status

Second air system status

-

Al Test

Secondary air injection system
operation prohibit

-

IGN Advance

Ignition advance

-

Knock Feedback
Value

Feedback value of knocking

-

Knock Correct
Learn Value

Correction learning value of
knocking

-

ACIS VSV

VSV for Acoustic Control
Induction System (ACIS)

-

VVT Control
Status #1

VVT control status

-

VVT Control
Status #2

VVT control status

-

Catalyst Temp B1
S1
Catalyst Temp B2
S1

Estimated catalyst temperature
(for Sensor 1)

-

Catalyst Temp B1
S2
Catalyst Temp B2
S2

Estimated catalyst temperature
(for Sensor 2)

-

Starter Signal

Starter switch (STSW) signal

-

Starter Control

Starter switch status

-

Power Steering
Signal Record

Power steering switch status

-

Power Steer. Sig.
Record

Power steering signal (history)

This signal status is usually ON until the cables are
disconnected from the battery terminals.

Neutral Position
SW Signal

Park/Neutral position (PNP)
switch signal

-

Stop Light Switch Stop light switch

-

A/C Signal

A/C signal

-

Closed Throttle
Position SW

Closed throttle position switch

-

Fuel Cut
Condition

Fuel cut condition

-

Immobilizer
Communication

Immobilizer communication

-

Electrical Load
Signal

Electrical load signal

-

Time after DTC
Cleared

Cumulative time after DTC
cleared

-

Distance from

Accumulated distance from

-

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

DTC Cleared

DTC cleared

Warm-up Cycle
Cleared DTC

Warm-up cycle after DTC
cleared

-

TC and TE1

TC and CG (TE1) terminals of
DLC3

-

Ignition Trig.
Count

Ignition counter

-

Cylinder #1
Misfire Count

Cylinder #1 misfire

Only displayed during idling.

Cylinder #2
Misfire Count

Cylinder #2 misfire

Only displayed during idling.

Cylinder #3
Misfire Count

Cylinder #3 misfire

Only displayed during idling.

Cylinder #4
Misfire Count

Cylinder #4 misfire

Only displayed during idling.

Cylinder #5
Misfire Count

Cylinder #5 misfire

Only displayed during idling.

Cylinder #6
Misfire Count

Cylinder #6 misfire

Only displayed during idling.

Cylinder #7
Misfire Count

Cylinder #7 misfire

Only displayed during idling.

Cylinder #8
Misfire Count

Cylinder #8 misfire

Only displayed during idling.

All Cylinders
Misfire Count

All cylinders misfire

Only displayed during idling.

Multi Cylinders
Misfire Count

Multiple cylinder misfire

-

Misfire RPM

Engine speed when misfire
occurred

-

Misfire Load

Engine load when misfire
occurred

-

Misfire Margin

Margin to detect engine misfire

-

Catalyst OT MF
F/C

Catalyst over temperature
misfire prevention F/C

-

Cat OT MF F/C
History

Catalyst over temperature
misfire prevention F/C history

-

Cat OT MF F/C
Cylinder#1

Display of fuel cut operation in
No. 1 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#2

Display of fuel cut operation in
No. 2 cylinder (if certain level
of misfire malfunction is
detected)

-

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

CHECK MODE PROCEDURE

HINT:

Techstream:

Compared to the normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can
detect the malfunctions that cannot be detected in normal mode.

Cat OT MF F/C
Cylinder#3

Display of fuel cut operation in
No. 3 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#4

Display of fuel cut operation in
No. 4 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#5

Display of fuel cut operation in
No. 5 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#6

Display of fuel cut operation in
No. 6 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#7

Display of fuel cut operation in
No. 7 cylinder (if certain level
of misfire malfunction is
detected)

-

Cat OT MF F/C
Cylinder#8

Display of fuel cut operation in
No. 8 cylinder (if certain level
of misfire malfunction is
detected)

-

ACT VSV

A/C cut status for Active Test

-

Idle Fuel Cut

Fuel cut idle

ON: when throttle valve fully closed and engine
speed over 3500 RPM.

FC TAU

Fuel cut during very light load

Fuel cut being performed under very light load to
prevent engine combustion from becoming
incomplete.

Alcohol Density
Estimate

Alcohol density estimate

-

Alcohol Density
Learning

Status of the alcohol density
learning

-

NOTE:

All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed
from normal mode to check mode or vice versa; or 2) the ignition switch is

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra