Toyota Avalon (XX50): Throttle Actuator "A" Control Motor Circuit Short to Ground or Open (P210014,P210015). Throttle/Pedal Position Sensor "A" Minimum Stop Performance (P210900). Throttle Actuator "A" Control System Actua

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Throttle Actuator "A" Control Motor Circuit Short to Ground or Open (P210014,P210015). Throttle/Pedal Position Sensor "A" Minimum Stop Performance (P210900). Throttle Actuator "A" Control System Actua

Throttle Actuator "A" Control Motor Circuit Short to Ground or Open (P210014,P210015)

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 a request from the hybrid system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P210014

Throttle Actuator "A" Control Motor Circuit Short to Ground or Open

Both of the following conditions are met for 2 seconds or more (1 trip detection logic):

  • The throttle actuator drive duty cycle is 80% or higher.
  • The throttle actuator current is less than 0.5 A.
  • Open or short in throttle actuator circuit
  • Throttle actuator
  • ECM

Comes on

DTC stored

SAE Code: P2102

P210015

Throttle Actuator "A" Control Motor Circuit Short to Battery or Open

Either of the following conditions is met (1 trip detection logic):

  • A motor driver IC high current limiter monitor input malfunction is detected.
  • A motor driver IC high current inhibit signal is received.
  • Open or short in throttle actuator circuit
  • Throttle actuator
  • Throttle valve
  • Throttle body with motor assembly
  • ECM

Comes on

DTC stored

SAE Code: P2103

MONITOR DESCRIPTION

The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not operate properly (for example, it is stuck open), the ECM will determines there is a malfunction, illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P2102: Electronic throttle actuator control motor range check (low current)

P2103: Electronic throttle actuator control motor range check (high current)

Required Sensors/Components (Main)

Throttle actuator (throttle body with motor assembly)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

2 seconds: P2102

0.1 seconds: P2103 (case 1)

0.6 seconds: P2103 (case 2)

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None
P2102

All of the following conditions are met

-

Command to electronic throttle actuator

On

Output duty cycle

80% or higher

Electronic throttle actuator power supply voltage

8 V or higher

Motor current change during last 0.016 seconds

Less than 0.2 A
P2103

Both of the following conditions are met

-

Command to electronic throttle actuator

On

Either of the following conditions is met

1 or 2

1. Electronic throttle actuator power supply voltage

8 V or higher

2. Command to electronic throttle actuator power

On

TYPICAL MALFUNCTION THRESHOLDS

P2102

Throttle actuator current

Less than 0.5 A
P2103: (Case 1)

Motor driver IC high current limiter monitor input

Fail
P2103: (Case 2)

Motor driver IC high current inhibit signal

On

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  9. Start the engine.
  10. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].

    HINT:

    During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [B] after charge control has completed.

  11. Check that 16 seconds or more have elapsed since the accelerator pedal was first depressed.
  12. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  13. 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.
  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  15. Input the DTC: P210014 or P210015.
  16. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

FAIL-SAFE

When this DTC 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 7.5° 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 engine torque request signal sent from the hybrid vehicle control ECU assembly, to allow the vehicle to continue being driven 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 power switch is then turned off.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

  • The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty Ratio (Open) / Throttle Motor Duty Ratio (Close)) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
  • 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.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

(a) Inspect the throttle body with motor assembly.

Click here

HINT:

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

Click here

NG

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM)

(a) Disconnect the throttle body with motor assembly connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C25-6 (M+) - C55-2 (M+)

Always

Below 1 Ω

C25-5 (M-) - C55-1 (M-)

Always

Below 1 Ω

C25-6 (M+) or C55-2 (M+) - Body ground and other terminals

Always

10 kΩ or higher

C25-5 (M-) or C55-1 (M-) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

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

(a) Check for foreign matter between the throttle valve and the housing.

OK:

No foreign matter between the throttle valve and housing.

HINT:

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

Click here

NG

REMOVE FOREIGN MATTER AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY
OK

4.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE)

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

OK:

Throttle valve opens and closes smoothly.

HINT:

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

Click here

OK

REPLACE ECM

NG

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

Throttle/Pedal Position Sensor "A" Minimum Stop Performance (P210900)

DESCRIPTION

The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of a throttle actuator, which operates the throttle valve, and a throttle position sensor, which detects the opening amount of the throttle valve. The ECM controls the throttle actuator to adjust the throttle valve opening amount so that the idle speed is maintained at the target idle speed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P210900

Throttle/Pedal Position Sensor "A" Minimum Stop Performance

The ISC learned value is approximately 3 times larger than normal even though the actual intake air amount during idle is within the normal range (up to 1.5 times the normal amount) (1 trip detection logic).

Throttle body with motor assembly

Does not come on

DTC stored

SAE Code: P2109

HINT:

  • The ISC learned value is the calculated intake air amount corresponding to the throttle opening amount necessary to maintain the idling speed.
  • This malfunction is only detected once per trip. After it has been detected once, the system will not monitor for the malfunction for the rest of the trip.
  • The system uses the throttle body with motor assembly and mass air flow meter sub-assembly to detect this malfunction.

MONITOR DESCRIPTION

If there are deposits in the throttle valve, a decrease in the ISC flow rate may cause engine stall or unstable idling. Therefore, the necessary ISC flow rate for idling is maintained using the ISC learned value and feedback. The ECM stores this DTC if the ISC learned value approaches its limit. The ECM begins monitoring for the DTC detection conditions when the following preconditions are met:

  1. The mass air flow meter sub-assembly is normal.
  2. Atmospheric pressure is 85 kPa(abs) [12.3 psi(abs)] or higher.
  3. The vehicle has been driven at a speed of 30 km/h (19 mph) or more at least once.
  4. The engine coolant temperature is 45°C (113°F) or less at engine start, the engine is warmed up and conditions for ISC learning are met, or the power switch has been turned on (IG) (include engine running) for 1 hour or more, the engine is warmed up and conditions for ISC learning are met.

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

  • Since a pending DTC is not stored for this DTC, it takes time to confirm whether the malfunction has been successfully repaired by checking for this DTC. When confirming whether the malfunction has been successfully repaired, compare "ISC Learning Value" recorded in the Freeze Frame Data with "ISC Learning Value" in the Data List after repairs have been made to save time.
  • 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 P210900)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P210900 is output

A

DTC P210900 and other DTCs are output

B

HINT:

If any DTCs other than P210900 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

READ FREEZE FRAME DATA (ISC LEARNING VALUE)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Using the Techstream, check "ISC Learning Value" in the Freeze Frame Data.

Powertrain > Engine > DTC(P210900) > Freeze Frame Data

Tester Display

ISC Learning Value

HINT:

Be sure to confirm that the Freeze Frame Data item "ISC Learning Value" is the same as that used when confirming whether the malfunction has been successfully repaired.

NEXT

3.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY

(a) Check for foreign matter between the throttle valve and the housing.

*1

Throttle Body with Motor Assembly

*2

Bore

*3

Throttle Valve

-

-

*a

Reference

*b

Throttle Body with Motor Assembly Cross-section Diagram

*c

When valve fully opened

*d

Deposits

HINT:

The illustration is for reference only, actual parts may differ.

Result

Proceed to

Foreign matter between the throttle valve and housing

A

No foreign matter between the throttle valve and housing

B

HINT:

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

Click here

B

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

A

4.

REMOVE FOREIGN MATTER (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY)

(a) Clean off any deposits inside of the throttle body with motor assembly.

*1

Throttle Body with Motor Assembly

*2

Bore

*3

Throttle Valve

-

-

*a

Reference

*b

Throttle Body with Motor Assembly Cross-section Diagram

*c

When valve fully opened

*d

Do not directly apply cleaner

*e

Deposits

-

-

(1) Push open the throttle valve and wipe off any deposits from the valve and bore using a cloth soaked in non-residue solvent.

NOTICE:

  • Make sure that the cloth or your fingers do not get caught in the valve.
  • Make sure that foreign matter does not enter the throttle valve.
  • Do not directly apply non-residue solvent to the throttle body with motor assembly or wash the throttle body with motor assembly. Cleaning solvent may leak into the motor from the shaft and cause problems such as rust or valve movement problems.
  • If there is coating material on the edge of the throttle valve, be careful not to remove it.
  • Push the throttle valve open gently with your finger and check that the throttle valve moves smoothly.

HINT:

  • If the throttle valve does not open smoothly, replace the throttle body with motor assembly.

    Click here

  • The illustration is for reference only, actual parts may differ.
NEXT

5.

READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

(a) Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.

Click here

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List / ISC Learning Value.

Powertrain > Engine > Data List

Tester Display

ISC Learning Value

(f) According to the display on the Techstream, read the Data List.

OK:

The value of ISC Learning Value is half or less of ISC Learning Value recorded in the Freeze Frame Data.

HINT:

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

Click here

OK

END
NG

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

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 built into 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 a request from the hybrid system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

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

DTC stored

SAE Code: 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

DTC stored

SAE Code: 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

Related DTCs

P2111: Throttle actuator stuck open

P2112: Throttle actuator stuck closed

Required Sensors/Components (Main)

Throttle actuator (throttle body with motor assembly)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

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 fail (P0121, P0122, P0123, P0222, P0223, P2135)

Not detected

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or higher

Throttle actuator fail (P2102)

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

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  9. Start the engine and fully depress and release the accelerator pedal quickly (to open and close the throttle valve) [B].

    HINT:

    During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [B] after charge control has completed.

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  11. 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.
  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  13. Input the DTC: P211172 or P211173.
  14. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

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 7.5° throttle valve opening angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. 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 power switch is then turned off.

WIRING DIAGRAM

Refer to DTC P210014.

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

HINT:

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

    Click here

  • 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 P211172 OR P211173)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P211172 or P211173 is output

A

DTC 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:

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

Click here

NG

GO TO STEP 6

OK

3.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

4.

READ VALUE USING TECHSTREAM (THROTTLE POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

Powertrain > Engine > Data List

Tester Display

Throttle Position Sensor No.1 Voltage

Throttle Position Sensor No.2 Voltage

Throttle Position Command

(e) Read the values displayed on the Techstream while wiggling the ECM wire harness.

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

(g) 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

(a) Replace the throttle body with motor assembly.

Click here

HINT:

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

Click here

NEXT

7.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power 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) Enter the following menus: Powertrain / Engine / Trouble Codes.

(c) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P211172 or P211173 is output

B
A

END
B

REPLACE ECM

Fuel Tank Pressure Sensor Circuit Short to Ground (P145011,P145015,P14502A,P14502F)

Throttle Actuator "A" Control Throttle Body Range/Performance (P211900,P211904,P211977,P21199B)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Throttle Actuator "A" Control Throttle Body Range/Performance (P211900,P211904,P211977,P21199B)
DESCRIPTION The electronic throttle control system is composed of the throttle actuator, throttle position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to a request from the hybrid system. The throttle position sensor detects the opening angle of ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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