SFI SYSTEM, Diagnostic DTC:P211900, P211904, P211977

DTC Code DTC Name
P211900 Throttle Actuator "A" Control Throttle Body Range/Performance
P211904 Throttle Actuator "A" Control Throttle Body Range/Performance System Internal Failure
P211977 Throttle Actuator "A" Control Throttle Body Range/Performance Commanded Position Not Reachable

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

Required Sensors/Components Throttle actuator (throttle body with motor assembly)
Frequency of Operation Continuous

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

B003ZZKE97

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on [A].

  6. Start the engine.

  7. Idle the engine for 20 seconds.

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [B].

  9. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  11. Input the DTC: P211900, P211904 or P211977.

  12. 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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, fully depress and release the accelerator pedal 3 times, and then check the DTC judgment result [C].

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 ignition switch is then turned off.

WIRING DIAGRAM

Refer to DTC P210014.

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • 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 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 P211900, P211904 OR P211977)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P211900, P211904 or P211977 is output A
      DTC P211900, P211904 or P211977 and other DTCs are output B

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Using the GTS, 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

      Tech Tips

      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

      Tech Tips

      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

      Tech Tips

      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

      Tech Tips

      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) Click here

    B

    GO TO VVT SYSTEM INSPECTION PROCEDURE (DTC P001400) Click here

    C

  3. READ VALUE USING GTS (THROTTLE POSITION)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Start the engine.

    7. Turn the GTS on.

    8. 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

    9. Read the values displayed on the GTS while fully depressing and releasing the accelerator pedal quickly.

      Result
      Result Proceed to
      Throttle Position Sensor No.1 Voltage does not change A
      Throttle Position Sensor No.1 Voltage changes even a little B

      Tech Tips

      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 Click here

    A

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


    1. Inspect the throttle body with motor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here

    OK

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


    1. 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.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 8 Click here

    OK

  6. READ VALUE USING GTS (THROTTLE POSITION)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON and turn the GTS on.

    7. 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

    8. Read the values displayed on the GTS while wiggling the ECM wire harness.

    9. Enter the following menus: Powertrain / Engine / Trouble Codes.

    10. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      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 9 Click here

    A

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


    1. 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

      Result
      Proceed to
      NEXT

    NEXT

    END

  8. REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY


    1. Replace the throttle body with motor assembly.

      Click here

      Tech Tips

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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine / Trouble Codes.

    10. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTC P211900, P211904 or P211977 is output B

    A

    END

    B

    REPLACE ECM Click here