Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Throttle Actuator "A" Control Throttle Body Range/Performance (P211900,P211904,P211977)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / Throttle Actuator "A" Control Throttle Body Range/Performance (P211900,P211904,P211977)

DESCRIPTION

The electronic throttle control system is composed of the throttle actuator, throttle position sensor, accelerator pedal position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to driver inputs. The throttle position sensor detects the opening angle of the throttle valve, and provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P211900

Throttle Actuator "A" Control Throttle Body Range/Performance

The throttle valve opening angle continues to vary greatly from the target opening angle (1 trip detection logic).

  • Electronic throttle control system
  • Wire harness or connector
  • ECM

Comes on

DTC stored

SAE Code: P2119

P211904

Throttle Actuator "A" Control Throttle Body Range/Performance System Internal Failure

The throttle valve opening angle continues to vary greatly from the target opening angle (1 trip detection logic).

  • Electronic throttle control system
  • Wire harness or connector
  • ECM

Comes on

DTC stored

SAE Code: P2119

P211977

Throttle Actuator "A" Control Throttle Body Range/Performance Commanded Position Not Reachable

The throttle valve opening angle continues to vary greatly from the target opening angle (1 trip detection logic).

  • Electronic throttle control system
  • Wire harness or connector
  • ECM

Comes on

DTC stored

SAE Code: P2119

MONITOR DESCRIPTION

The ECM determines the actual opening angle of the throttle valve from the throttle position sensor signal. The actual opening angle is compared to the target opening angle commanded by the ECM. If the difference between these two values is outside the standard range, the ECM interprets this as a malfunction in the electronic throttle control system, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2119: Electronic throttle control system malfunction

Required Sensors/Components (Main)

Throttle actuator (throttle body with motor assembly)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second: Closed

0.6 seconds: Open

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

System guard* judge condition

On

*: System guard is on when the 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

Either of the following conditions is met

1 or 2

1. Difference between commanded closed throttle position and current closed throttle position

0.3 V or higher

2. Difference between commanded open throttle position and current open throttle position

0.3 V or higher

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 engine 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 engine switch off and wait for at least 30 seconds.
  6. Turn the engine switch on (IG) [A].
  7. Turn the Techstream on.
  8. Start the engine.
  9. Idle the engine for 20 seconds.
  10. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  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: P211900, P211904 or P211977.
  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.
    • If the judgment result is INCOMPLETE, fully depress and release the accelerator pedal 3 times, and then check the DTC judgment result [C].
    • [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 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 any of these DTCs or other DTCs relating to Electronic Throttle Control System (ETCS) 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 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 engine switch is then turned off.

WIRING DIAGRAM

Refer to DTC P210014.

Click here

CAUTION / NOTICE / HINT

HINT:

  • Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position Sensor No.1 Voltage, Throttle Position Sensor No.2 Voltage, 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 P211900, P211904 OR P211977)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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 P211900, P211904 or P211977 is output

A

DTC P211900, P211904 or P211977 and other DTCs are output

B

HINT:

If any DTCs other than P211900, P211904 or P211977 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

READ FREEZE FRAME DATA (VVT CHANGE ANGLE, VVT TARGET ANGLE AND VVT OCV CONTROL DUTY RATIO)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

Click here

for Intake Camshaft of Bank 1:

Freeze Frame Data Item

Result

Proceed to

Intake VVT Change Angle Bank 1 and Intake VVT Target Angle Bank 1

Difference between Intake VVT Change Angle Bank 1 and Intake VVT Target Angle Bank 1 is +/- 5 DegFR or more*1

A

Intake VVT OCV Control Duty Ratio Bank 1

0% or 100% is displayed*2

Both freeze frame data items listed above

Values are other than above

C

HINT:

If *1 or *2 is applicable, the malfunction may be caused by Intake VVT System Bank 1 being over-retarded or over-advanced, so perform inspection following the procedures for DTC P001100 (Camshaft Position "A" - Timing Over-Advanced or System Performance Bank 1) and P001200 (Camshaft Position "A" - Timing Over-Retarded Bank 1).

for Intake Camshaft of Bank 2:

Freeze Frame Data Item

Result

Proceed to

Intake VVT Change Angle Bank 2 and Intake VVT Target Angle Bank 2

Difference between Intake VVT Change Angle Bank 2 and Intake VVT Target Angle Bank 2 is +/- 5 DegFR or more*3

A

Intake VVT OCV Control Duty Ratio Bank 2

0% or 100% is displayed*4

Both freeze frame data items listed above

Values are other than above

C

HINT:

If *3 or *4 is applicable, the malfunction may be caused by Intake VVT System Bank 2 being over-retarded or over-advanced, so perform inspection following the procedures for DTC P002100 (Camshaft Position "A" - Timing Over-Advanced or System Performance Bank 2) and P002200 (Camshaft Position "A" - Timing Over-Retarded Bank 2).

for Exhaust Camshaft of Bank 1:

Freeze Frame Data Item

Result

Proceed to

Exhaust VVT Change Angle Bank 1 and Exhaust VVT Target Angle Bank 1

Difference between Exhaust VVT Change Angle Bank 1 and Exhaust VVT Target Angle Bank 1 is +/- 5 DegFR or more*5

B

Exhaust VVT OCV Control Duty Ratio Bank 1

0% or 100% is displayed*6

Both freeze frame data items listed above

Values are other than above

C

HINT:

If *5 or *6 is applicable, the malfunction may be caused by Exhaust VVT System Bank 1 being over-retarded or over-advanced, so perform inspection following the procedures for DTC P001400 (Camshaft Position "B" - Timing Over-Advanced or System Performance Bank 1) and P001500 (Camshaft Position "B" - Timing Over-Retarded Bank 1).

for Exhaust Camshaft of Bank 2:

Freeze Frame Data Item

Result

Proceed to

Exhaust VVT Change Angle Bank 2 and Exhaust VVT Target Angle Bank 2

Difference between Exhaust VVT Change Angle Bank 2 and Exhaust VVT Target Angle Bank 2 is +/- 5 DegFR or more*7

B

Exhaust VVT OCV Control Duty Ratio Bank 2

0% or 100% is displayed*8

Both freeze frame data items listed above

Values are other than above

C

HINT:

If *7 or *8 is applicable, the malfunction may be caused by Exhaust VVT System Bank 2 being over-retarded or over-advanced, so perform inspection following the procedures for DTC P002400 (Camshaft Position "B" - Timing Over-Advanced or System Performance Bank 2) and P002500 (Camshaft Position "B" - Timing Over-Retarded Bank 2).

A

GO TO VVT SYSTEM INSPECTION PROCEDURE (DTC P001100)

B

GO TO VVT SYSTEM INSPECTION PROCEDURE (DTC P001400)

C

3.

READ VALUE USING TECHSTREAM (THROTTLE POSITION)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

(f) Start the engine.

(g) Turn the Techstream on.

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

Powertrain > Engine > Data List

Tester Display

Throttle Position Sensor No.1 Voltage

Throttle Position Command

(i) Read the values displayed on the Techstream while fully depressing and releasing the accelerator pedal quickly.

Result

Proceed to

Throttle Position Sensor No.1 Voltage does not change

A

Throttle Position Sensor No.1 Voltage changes even a little

B

HINT:

When a DTC is output, the system changes to fail-safe mode. Therefore, only use the data up until the time the DTC is stored for confirmation.

B

GO TO STEP 5

A

4.

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

(a) Inspect the throttle body with motor assembly.

Click here

NG

GO TO STEP 8

OK

5.

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

(a) Check for contamination 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 8

OK

6.

READ VALUE USING TECHSTREAM (THROTTLE POSITION)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

(f) Turn the engine switch on (IG) and turn the Techstream on.

(g) 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

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

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

(j) 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 9

A

7.

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

8.

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

9.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs

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

NEXT

10.

CHECK WHETHER DTC OUTPUT RECURS (DTC P211900, P211904 OR P211977)

(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 P211900, P211904 or P211977 is output

B

A

END

B

REPLACE ECM

    Throttle Actuator "A" Control System Actuator Stuck Open (P211172,P211173)

    A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground (P223711,...,P225412)

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