Toyota Tundra. Manual — part 1599

Fig. 221: Identifying D9 Throttle Body Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Measure the resistance according to the value (s) in the table below.

2009 Toyota Tundra

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPLACE THROTTLE BODY ASSEMBLY (See REMOVAL )

OK: Go to Next Step

2. CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)

a. Disconnect the D9 throttle body connector.

b. Disconnect the D74 ECM connector.

Fig. 222: Identifying D9 Throttle Body And D74 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

3. INSPECT THROTTLE BODY ASSEMBLY

a. Check for foreign objects between the throttle valve and the housing.

Tester Connection Condition Specified Condition

2 (M+) - 1 (M-)

20°C (68°F)

0.3 to 100 ohms

Tester Connection

Condition Specified Condition

D9-2 (M+) - D74-19 (M+)

Always

Below 1 ohms

D9-1 (M-) - D74-18 (M-)

Always

Below 1 ohms

D9-2 (M+) or D74-19 (M+) - Body ground Always

10 kohms or higher

D9-1 (M-) or D74-18 (M-) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

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

OK:

No foreign objects between throttle valve and housing.

NG: REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

OK: Go to Next Step

4. INSPECT THROTTLE VALVE

a. Check if the throttle valve opens and closes smoothly.

OK:

Throttle valve opens and closes smoothly.

NG: REPLACE THROTTLE BODY ASSEMBLY (See REMOVAL )

OK: REPLACE ECM (See REMOVAL )

DTC P2111 THROTTLE ACTUATOR CONTROL SYSTEM - STUCK OPEN; DTC P2112
THROTTLE ACTUATOR CONTROL SYSTEM - STUCK CLOSED

DESCRIPTION

The throttle actuator is operated by the ECM, and opens and closes the throttle valve using gears. The opening
angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on the throttle
body. The TP sensor provides feedback to the ECM so that it can control the throttle actuator (throttle valve)
appropriately in response to driver inputs.

HINT

This ETCS (Electronic Throttle Control System) does not use a throttle cable.

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle

DTC

DTC Detection Condition

Trouble Area

P2111

Throttle actuator does not close
when signaled by ECM (1 trip
detection logic)



Throttle actuator



Throttle body assembly



Throttle valve

P2112

Throttle actuator does not open
when signaled by ECM (1 trip
detection logic)



Throttle actuator



Throttle body assembly



Throttle valve

2009 Toyota Tundra

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

despite a high drive current from the ECM. The ECM illuminates the MIL and stores a DTC. If the malfunction
is not repaired successfully, a DTC is set when the accelerator pedal is fully depressed and released quickly (to
fully open and close the throttle valve) after the engine is next started.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All:

TYPICAL ENABLING CONDITIONS - ALL

P2111 (Throttle actuator stuck open):

TYPICAL ENABLING CONDITIONS - P2111 (THROTTLE ACTUATOR STUCK OPEN)

P2112 (Throttle actuator stuck closed):

TYPICAL ENABLING CONDITIONS - P2112 (THROTTLE ACTUATOR STUCK CLOSED)

Related DTCs

P2111 Throttle actuator stuck open
P2112 Throttle actuator stuck closed

Required Sensors/Components (Main)

Throttle actuator

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

System guard*

ON

System guard is ON when the following conditions set

-

Throttle actuator

ON

Throttle actuator duty calculation

Executing

Throttle position sensor

Fail determined

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or higher

Throttle actuator

Fail determined

All of following conditions met

-

Throttle actuator current

2 A or more

Duty cycle to close throttle

80% or more

All of following conditions met

-

Throttle actuator current

2 A or more

Duty cycle to open throttle

80% or more

2009 Toyota Tundra

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