Toyota Tundra. Manual — part 1311

fault



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

AF FT B1 S1

Fuel trim at A/F sensor

-

AFS B1 S1

A/F sensor current

-

AF FT B2 S1

Fuel trim at A/F sensor

-

Catalyst Temp (B1S1)
Catalyst Temp (B2S1)

Estimated catalyst
temperature (for Sensor
1)

-

Catalyst Temp (B1 S2)
Catalyst Temp (B2 S2)

Estimated catalyst
temperature (for Sensor
2)

-

Sub O2S Impedance

B1S2 Sub O2S

Impedance B2S2

Sub heated oxygen
sensor impedance (for
Sensor 2)

-

Initial Engine Coolant

Temp

Engine coolant
temperature at engine
start

-

Initial Intake Air Temp

Intake air temperature
at engine start

-

Injection Volum

(Cylinder1)

Injection volume

-

Air pump pressure

(absolute)

Air pump pressure

-

Air Pump Pulsation

Pressure

Air pump pulsation
pressure

-

Air Pump2 Pressure

(Absolute)

Air pump pressure

-

Air Pump2 Pulsation

Pressure

Air pump pulsation
pressure

-

Power Steering Pressure

Power steering pressure
sensor

-

ACC Relay

ACC relay status

-

Starter Relay

Starter relay status

-

Starter Signal

Starter switch (STSW)
signal

-

Starter Control

Starter switch status

-

Closed Throttle Position

SW

Closed throttle position
switch

-

A/C Signal

A/C signal

-

Neutral Position SW

Signal

Park/Neutral position
(PNP) switch signal

-

Electrical Load Signal Electrical load signal

-

Stop Light Switch

Stop light switch

-

2008 Toyota Tundra

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

Immobilizer

Communication

Immobilizer
communication

-

Fuel Cut Condition

Fuel cut condition

-

Battery Voltage

Battery voltage

-

Atmosphere Pressure

Atmosphere pressure

-

Secondary Air Control

VSV

Secondary air injection
system status

-

ACIS VSV

VSV for Acoustic
Control Induction
System (ACIS)

-

ACT VSV

A/C cut status for
Active Test

-

VVT Control Status

(Bank 2)

VVT control status

-

EVAP Purge VSV

EVAP Purge VSV

-

Fuel Pump/Speed Status Fuel pump/speed status

-

VVT Control Status

(Bank 1)

VVT control status

-

Vacuum Pump

Key-off EVAP system
leak detection pump
status

Refer to EVAP SYSTEM

EVAP System Vent

Value

Key-off EVAP system
vent valve status

-

TC and TE1

TC and CG (TE1)
terminals of DLC3

-

Al Operation Prohibit

Secondary air injection
system operation
prohibit

-

VVT Aim Angle (Bank

1)

VVT aim angle

-

VVT Change Angle

(Bank 1)

VVT change angle

-

VVT OCV Duty (Bank

1)

VVT OCV operation
duty

-

VVT Aim Angle (Bank

2)

VVT aim angle

-

VVT Change Angle

(Bank 2)

VVT change angle

-

VVT OCV Duty (Bank

2)

VVT OCV operation
duty

-

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

2008 Toyota Tundra

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

CHECK MODE PROCEDURE

HINT:

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.

Ignition

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

-

Engine Run Time

Accumulated engine
running time

-

Time after DTC Cleared

Cumulative time after
DTC cleared

-

Distance from DTC

Cleared

Accumulated distance
from DTC cleared

-

Warm up Cycle Cleared

DTC

Warm-up cycle after
DTC cleared

-

NOTE:

All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed

2008 Toyota Tundra

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

1. CHECK MODE PROCEDURE

a. Check and ensure the following condition:

1. Battery positive voltage 11 V or higher.

2. Throttle valve fully closed.

3. Transmission in the P or N position.

4. A/C switch OFF.

b. Turn the ignition switch off.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch to ON.

e. Turn the Techstream ON.

f. Enter the following menus: Powertrain/Engine and ECT/Utility/Check Mode.

g. Switch the ECM from normal mode to check mode.

h. Make sure the MIL flashes as shown in the illustration.

i. Start the engine.

j. Make sure the MIL turns OFF.

k. Simulate the conditions of the malfunction described by the customer.

l. Check DTCs and freeze frame data using the Techstream.

Fig. 33: Malfunction Indicator Lamp - Blinking Pattern

FAIL-SAFE CHART

If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven
temporarily.

FAIL-SAFE CHART

from normal mode to check mode or vice versa; or 2) the ignition switch is
turned from ON to ACC or OFF while in check mode. Before changing modes,
always check and note any DTCs and freeze frame data.

DTC

Component

Fail-Safe Operation

Fail-Safe

Deactivation

Condition

Air-Fuel Ratio

2008 Toyota Tundra

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