Toyota Tundra. Manual — part 1490

1. CHECK MODE PROCEDURE

a. Check and ensure the following condition:

1. Battery positive voltage 11 V or more.

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.

Fig. 35: MIL Flashes Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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.

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

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

2009 Toyota Tundra

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

Condition

P0031, P0032, P0051
and P0052

Air-Fuel Ratio
(A/F) Sensor
Heater

ECM turns off A/F sensor heater.

Ignition switch
off

P0037, P0038, P0057
and P0058

Heated Oxygen
(HO2) Sensor
Heater

ECM turns off HO2 sensor heater.

Ignition switch
off

P0102 and P0103

Mass Air Flow
(MAF) Meter

ECM calculates ignition timing according
to engine speed and throttle valve position.

Pass condition
detected

P0112 and P0113

Intake Air
Temperature (IAT)
Sensor

ECM estimates IAT to be 20°C (68°F).

Pass condition
detected

P0115, P0117 and
P0118

Engine Coolant
Temperature
(ECT) Sensor

ECM estimates ECT to be 80°C (176°F).

Pass condition
detected

P0120, P0121, P0122,
P0123, P0220, P0222,
P0223, P0604, P0606,
P060A, P060B,
P060D, P060E, P0657,
P2102, P2103, P2111,
P2112, P2118, P2119
and P2135

Electronic Throttle
Control System
(ETCS)

ECM cuts off throttle actuator current and
throttle valve returned to 7° throttle
position by return spring.
ECM then adjusts engine output by
controlling fuel injection (intermittent fuel-
cut) and ignition timing in accordance with
accelerator pedal opening angle to allow
vehicle to continue at minimal speed*1.

Pass condition
detected and then
ignition switch
turned off

P0300, P0301, P0302,
P0303, P0304, P0305,
P0306, P0307 and
P0308*2



Fuel injector



Electronic
Throttle
Control
System
(ETCS)

When misfire occurs, fuel cut is performed
for catalyst overheat malfunction
prevention



During normal load and normal
engine speed (MIL is blinking)



Fuel cut is performed on
malfunctioning cylinder



During high load and high engine
speed (MIL is blinking)



Throttle valve opening angle
control is performed



All cylinder fuel cut or
malfunction cylinder fuel cut

Pass condition
detected and then
ignition switch
turned off

P0327, P0328, P032C,
P032D, P0332, P0333,
P033C and P033D

Knock Sensor

ECM sets ignition timing to maximum
retard.

Ignition switch
off

P0351 to P0358

Igniter

ECM cuts fuel.

Pass condition
detected

P0504

Stop Light Switch Accelerator pedal angle is fixed.

Accelerator
pedal angle is
fixed

2009 Toyota Tundra

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

DATA LIST/ACTIVE TEST

1. DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and
other items to be read without removing any parts. This non-intrusive inspection can be very useful
because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading
the Data List information early in troubleshooting is one way to save diagnostic time.

a. Warm up the engine.

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/Data List.

g. According to the display on the Techstream, use the Data List.

DATA LIST REFERENCE

P2120, P2121, P2122,
P2123, P2125, P2127,
P2128 and P2138

Accelerator Pedal
Position (APP)
Sensor

APP sensor has 2 sensor circuits: Main and
Sub.
If either circuit malfunctions, ECM controls
engine using other circuit.
If both circuits malfunction, ECM regards
accelerator pedal as being released. As a
result, throttle valve closed and engine
idles.

Pass condition
detected and then
ignition switch
turned off

P2432, P2433, P2437
and P2438

Secondary Air
Injection System

Throttle valve opening angle control is
performed

Pass condition
detected

P2440 and P2442

Secondary Air
Injection System

Throttle valve opening angle control is
performed

Pass condition
detected

P2445 and P2447

Secondary Air
Injection System

Throttle valve opening angle control is
performed

Pass condition
detected

HINT:



*1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If
the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.



*2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.

NOTE:

In the table below, the values listed under "Normal Condition" are
reference values. Do not depend solely on these reference values when
deciding whether a part is faulty or not.

2009 Toyota Tundra

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

Tester Display

Measurement

Item/Range

Normal Condition

Diagnostic Note

Vehicle Speed

Vehicle speed/
Min.: 0 km/h, Max.:
255 km/h

Actual vehicle speed Speed indicated on speedometer.

Engine Speed

Engine speed/ Min.:
0 RPM, Max.:
16383 RPM

650 to 750 RPM:
Idling

-

Calculate Load

Calculated load by
ECM/ Min.: 0%,
Max.: 100%



11 to 25%:
Idling



12 to 26%:
Running
without load
(2500 RPM)

-

Vehicle Load

Vehicle load/ Min.:
0%, Max.: 25700%

Actual vehicle load

-

MAF

Air flow rate from
Mass Air Flow
(MAF) meter/ Min.:
0 g/sec., Max.:
655.35 g/sec.

4.0 to 8.0 g/sec.:
Idling

If the value approximately 0.0 g/sec.:



Mass air flow meter power
source circuit open.



VG circuit open or short.

If the value 160.0 g/sec. or more:



E2G circuit open.

Atmosphere
Pressure

Atmospheric
pressure/ Min.: 0
kPa, Max.: 255 kPa

Equivalent to
atmospheric pressure
(absolute pressure)

-

Coolant Temp

Engine coolant
temperature: Min.: -
40°C, Max.: 140°C

80 to 100°C (176 to
212°F): After
warming up

If the value -40°C (-40°F): sensor
circuit open.
If the value 140°C (284°F): sensor
circuit shorted.

Intake Air

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

Equivalent to
ambient air
temperature

If the value -40°C (-40°F): sensor
circuit open.
If the value 140°C (284°F): sensor
circuit shorted.

Ambient
Temperature

Ambient
Temperature Min.:-
40°C, Max.: 215°C

Actual ambient
temperature

-

Engine Run
Time

Engine run time/
Min.: 0 seconds,
Max.: 65535
seconds

Time after engine
start

Service data

Initial engine

2009 Toyota Tundra

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