Toyota Yaris: Sfi System / Throttle Actuator "A" Control System Actuator Stuck Open (P211172,P211173)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Throttle Actuator "A" Control System Actuator Stuck Open (P211172,P211173)

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 with motor assembly. 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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P211172

Throttle Actuator "A" Control System Actuator Stuck Open

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

  • Throttle actuator
  • Throttle body with motor assembly
  • Throttle valve
  • Wire harness or connector
  • ECM

Comes on

SAE: P2111

P211173

Throttle Actuator "A" Control System Actuator Stuck Closed

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

  • Throttle actuator
  • Throttle body with motor assembly
  • Throttle valve
  • Wire harness or connector
  • ECM

Comes on

SAE: P2112

MONITOR DESCRIPTION

If the throttle valve remains at a certain angle despite a high drive current from the ECM, the ECM determines that there is a malfunction in the Electronic Throttle Control System (ETCS), illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components

Throttle actuator (throttle body with motor assembly)

Frequency of Operation

Continuous

TYPICAL ENABLING CONDITIONS

P2111: Throttle Actuator Stuck Open

All of the following conditions are met

-

System guard* judge condition

On

Throttle actuator current

2 A or higher

Duty-cycle to close throttle

80% or higher

P2112: Throttle Actuator Stuck Closed

All of the following conditions are met

-

System guard* judge condition

On

Throttle actuator current

2 A or higher

Duty-cycle to open throttle

80% or higher

*: System guard set when following conditions are met

-

Throttle actuator

On

Throttle actuator duty calculation

Executing

Throttle position sensor malfunction (monitor of following codes judged fail in this trip)

Not detecting

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or higher

Throttle motor malfunction (monitor of following code judged fail in this trip)

Not detecting

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 GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON [A].
  7. Turn the GTS on.
  8. Start the engine and fully depress and release the accelerator pedal quickly (to open and close the throttle valve) [B].
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  10. 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.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P211172 or P211173.
  13. Check the DTC judgment result.

    GTS 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.

FAIL-SAFE

When these DTCs 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 8° throttle valve opening 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 P210018.

Click here

CAUTION / NOTICE / HINT

HINT:

  • Refer to "Data List / Active Test" [Throttle Position Sensor No.1 Voltage, Throttle Position Sensor No.2 Voltage, Throttle2 Throttle Position Sensor No.1 Voltage, Throttle2 Throttle Position Sensor No.2 Voltage, Throttle Position Command, Throttle2 Throttle Position Command, Throttle Motor Current, Throttle2 Throttle Motor Current, Throttle Motor Duty Ratio (Open), Throttle Motor Duty Ratio (Close), Throttle2 Throttle Motor Duty Ratio (Open) and Throttle2 Throttle Motor Duty Ratio (Close)].

    Click here

  • Read Freeze Frame Data using the GTS. 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 P211172 or P211173)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

P211172 or P211173 is output

A

P211172 or P211173 and other DTCs are output

B

HINT:

If any DTCs other than P211172 or P211173 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

(a) Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also check that the throttle valve moves smoothly.

OK:

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

HINT:

  • When cleaning or replacing one throttle body with motor assembly, clean the other throttle body with motor assembly.

    Click here

  • Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.

    Click here

NG

GO TO STEP 6

OK

3.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

4.

READ VALUE USING GTS (THROTTLE POSITION)

(a) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Throttle Position Sensor No.1 Voltage

Throttle Position Sensor No.2 Voltage

Throttle Position Command

(b) Read the values displayed on the GTS while wiggling the ECM wire harness.

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes

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 7

A

5.

REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM)

(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.

Click here

NEXT

END

6.

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

Click here

HINT:

  • When cleaning or replacing one throttle body with motor assembly, clean the other throttle body with motor assembly.

    Click here

  • Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

    Click here

NEXT

7.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

8.

CHECK WHETHER DTC OUTPUT RECURS (DTC P211172 OR P211173)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

P211172 or P211173 is output

B

A

END

B

REPLACE ECM

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