Toyota Tundra. Manual - part 1533

HINT:



When any of these DTCs are set, check the throttle valve opening angle by entering the following menus:
Powertrain/Engine and ECT/Data List/ETCS/Throttle Position No. 1 and Throttle Position No. 2.



Throttle Position No. 1 is the VTA1 signal, and Throttle Position No. 2 is the VTA2 signal.

Reference (Normal Condition)

DATA LIST REFERENCE

MONITOR DESCRIPTION

The ECM uses the Throttle Position (TP) sensor to monitor the throttle valve opening angle. There are several
checks that the ECM performs to confirm the proper operation of the TP sensor.



A specific voltage difference is expected between the sensor terminals, VTA1 and VTA2, for each
throttle valve opening angle. If the difference between VTA1 and VTA2 is incorrect, the ECM interprets
this as a malfunction in the sensor, and sets a DTC.



VTA1 and VTA2 each have a specific voltage range. If VTA1 or VTA2 is outside the normal operating
range, the ECM interprets this as a malfunction in the sensor, and sets a DTC.



VTA1 and VTA2 should never be close to the same voltage level. If VTA1 is within 0.02 V of VTA2, the
ECM determines that there is a short circuit in the sensor, and sets a DTC.

P0223

Output voltage of VTA2 4.8 V or
more, and VTA1 between 0.2 V
and 2.02 V for 2 seconds when
accelerator pedal depressed (1 trip
detection logic)

body)



Open in VTA2 circuit



Open in E2 circuit



Short between VC and
VTA2 circuits



ECM

P2135

Either condition (a) or (b) met (1
trip detection logic):

a. Difference between output

voltages of VTA1 and VTA2
0.02 V or less for 0.5
seconds or more

b. Output voltage of VTA1 0.2

V or less, and VTA2 1.75 V
or less, for 0.4 seconds or
more



Short between VTA1 and
VTA2 circuits



TP sensor (built into throttle
body)



ECM

Display Item

Accelerator Pedal Fully Released Accelerator Pedal Fully Depressed

Throttle Position No. 1

0.5 to 1.1 V

3.3 to 4.9 V

Throttle Position No. 2

2.1 to 3.1 V

4.6 to 5.0 V

2009 Toyota Tundra

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

If the malfunction is not repaired successfully, a DTC is set 10 seconds after the engine is next started.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

P0120:

TYPICAL MALFUNCTION THRESHOLDS - P0120

P0122:

TYPICAL MALFUNCTION THRESHOLDS - P0122

P0123:

TYPICAL MALFUNCTION THRESHOLDS - P0123

Related DTCs

P0120: Throttle position sensor 1 range check (Fluctuating)
P0122: Throttle position sensor 1 range check (Low voltage)
P0123: Throttle position sensor 1 range check (High voltage)
P0220: Throttle position sensor 2 range check (Fluctuating)
P0222: Throttle position sensor 2 range check (Low voltage)
P0223: Throttle position sensor 2 range check (High voltage)
P2135: Throttle position sensor range check (Correlation)

Required Sensors/Components (Main)

Throttle position sensor

Required Sensors/Components (Related) -
Frequency of Operation

Continuous

Duration

2 seconds: P0120, P0122, P0123, P0220, P0222 and P0223
0.5 seconds: P2135 Case 1
0.4 seconds: P2135 Case 2

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Either of following conditions A or B met

A. Ignition switch ON

0.012 seconds or more

B. Electronic throttle actuator power

VTA1 voltage

0.2 V or less, or 4.54 V or more

VTA1 voltage

0.2 V or less

VTA1 voltage

4.54 V or more

2009 Toyota Tundra

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

P0220

TYPICAL MALFUNCTION THRESHOLDS - P0220

P0222:

TYPICAL MALFUNCTION THRESHOLDS - P0222

P0223:

TYPICAL MALFUNCTION THRESHOLDS - P0223

P2135 Case 1:

TYPICAL MALFUNCTION THRESHOLDS - P2135 CASE 1

P2135 Case 2:

TYPICAL MALFUNCTION THRESHOLDS - P2135 CASE 2

COMPONENT OPERATING RANGE

FAIL-SAFE

When any of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the
throttle actuator, and the throttle valve is returned to a 7° throttle angle by the return spring. The ECM then
adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in
accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the
accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly. Fail-safe mode continues
until a pass condition is detected, and the ignition switch is then turned off.

WIRING DIAGRAM

When either condition below is met:

Condition A or B

A. VTA2 voltage

1.75 V or less

B. VTA2 voltage when VTA1 0.2 V or more, and 2.02 V or less

4.8 V or more

VTA2 voltage

1.75 V or less

VTA2 voltage when VTA1 0.2 V or more, and 2.02 V or less

4.8 V or more

Difference between VTA1 and VTA2 voltages

0.02 V or less

VTA1 voltage

0.2 V or less

VTA2 voltage

1.75 V or less

VTA1 voltage

0.69 to 4.05 V

VTA2 voltage

2.25 to 4.8 V

2009 Toyota Tundra

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

Fig. 86: Throttle Pedal Position Sensor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:



These DTCs relate to the Throttle Position (TP) sensor.



Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data from the time the malfunction occurred.

1. READ VALUE USING TECHSTREAM (THROTTLE POSITION)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and turn the Techstream ON.

c. Enter the following menus: Powertrain/Engine and ECT/Data List/ETCS/Throttle Position No.1

and Throttle Position No.2.

d. Check the values displayed on the Techstream.

Result

RESULT REFERENCE

TP#1 (VTA1)

When

Accelerator

Pedal Released

TP#2 (VTA2)

When

Accelerator

Pedal Released

TP#1 (VTA1)

When

Accelerator

Pedal Depressed

TP#2 (VTA2)

When

Accelerator

Pedal Depressed

Trouble

Area

Proceed

0 to 0.2 V

VC circuit

open

4.5 to 5.0 V

E2 circuit

open

0 to 0.2 V, or 4.5

to 5.0 V

2.4 to 3.4 V (Fail-

safe)

0 to 0.2 V, or 4.5

to 5.0 V

2.4 to 3.4 V (Fail-

safe)

VTA1

circuit open

or ground

short

VTA2

2009 Toyota Tundra

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

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