Toyota Venza manuals

Toyota Venza: Throttle Actuator Control System - Stuck Open (P2111,P2112)

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / Throttle Actuator Control System - Stuck Open (P2111,P2112)

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 sensor, which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

HINT:

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

DTC No.

DTC Detection Condition

Trouble Area

P2111

The ECM signals the throttle actuator to close, but the actuator is stuck (1 trip detection logic).

  • Throttle actuator
  • Throttle body
  • Throttle valve
  • ECM
  • Wire harness or connector

P2112

The ECM signals the throttle actuator to open, but the actuator is stuck (1 trip detection logic).

  • Throttle actuator
  • Throttle body
  • Throttle valve
  • ECM
  • Wire harness or connector

MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2111: Throttle Actuator Stuck Open

P2112: Throttle Actuator Stuck Closed

Required Sensors/Components (Main)

Throttle actuator (throttle body)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All:

Monitor runs whenever following DTCs not stored

None

P2111 (Throttle Actuator Stuck Open):

All of following conditions are met:

-

System guard* judge condition

ON

Throttle actuator current

2 A or higher

Duty-cycle to close throttle

80% or more

P2112 (Throttle Actuator Stuck Closed):

All of following conditions are met:

-

System guard* judge condition

ON

Throttle actuator current

2 A or higher

Duty-cycle to open throttle

80% or more

*: System guard is ON when following conditions are met:

-

Throttle actuator

ON

Throttle actuator duty calculation

Executing

Throttle position sensor fail

Not detected

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or higher

Throttle actuator fail

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P2111 (Throttle Actuator Stuck Open):

Throttle position sensor voltage

No change

P2112 (Throttle Actuator Stuck Closed):

Throttle position sensor voltage

No change

CONFIRMATION DRIVING PATTERN


  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page ).

  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
  7. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  8. Read the Pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  10. Input the DTC: P2111 or P2112.
  11. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
  12. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions, is 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 6° 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 running 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

Refer to DTC P2102 (See page ).


CAUTION / NOTICE / HINT

HINT:

  • Refer to "Data List / Active Test" [Throttle Position Commanded, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)] (See page ).

  • Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Result

Result

Proceed to

DTC P2111 or P2112 is output

A

DTC P2111 or P2112 and other DTCs are output

B

HINT:

If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first.


B

GO TO DTC CHART


A

2.

INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

(a) Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly.

OK:

Throttle valve is not contaminated with foreign objects and moves smoothly.


NG

GO TO STEP 5


OK

3.

READ VALUE USING TECHSTREAM (THROTTLE POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs (See page ).


(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Turn the ignition switch to ON.

(g) Enter the following menus: Powertrain / Engine / Data List / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.

(h) Check the values displayed on the Techstream while wiggling the ECM wire harness.

(i) Enter the following menus: Powertrain / Engine / Trouble Codes.

(j) Check for DTCs.

Result

Result

Proceed to

Value in Data List changes when wire harness is wiggled, or DTC is output

A

Other than above

B


B

GO TO STEP 6


A

4.

REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY)

(a) As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector (See page ).



NEXT

END

5.

REPLACE THROTTLE BODY ASSEMBLY

(a) Replace the throttle body assembly (See page ).


HINT:

Perform "Inspection After Repair" after replacing the throttle body (See page ).



NEXT

6.

CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs (See page ).


(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Start the engine, and then fully depress and release the accelerator pedal quickly to fully open and close the throttle valve.

(g) Enter the following menus: Powertrain / Engine / Trouble Codes.

(h) Read the DTCs.

Result

Proceed to

DTC is not output

A

DTC P2111 or P2112 is output

B


A

END


B

REPLACE ECM

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