SFI SYSTEM, Diagnostic DTC:P2109

DTC Code DTC Name
P2109 Throttle / Pedal Position Sensor "A" Minimum Stop Performance

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
P2109 Throttle / Pedal Position Sensor "A" Minimum Stop Performance

The Throttle Air Flow F/B 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) (5 trip detection logic).

*: Data List item

 Throttle body with motor assembly Does not come on DTC stored

Tech Tips


  • 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 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 throttle air flow feedback. The ECM stores this DTC if the Throttle Air Flow F/B 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 is normal.

2) Atmospheric pressure is 85 kPa(abs) [637.6 mmHg(abs)] or higher.

3) The vehicle has been driven at a speed of 30 km/h (18.7 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 "Throttle Air Flow F/B Value" are met, or the ignition switch has been turned to ON (including when the engine is running) for 1 hour or more, the engine is warmed up and conditions for "Throttle Air Flow F/B Value" are met.

CAUTION / NOTICE / HINT

Tech Tips


  • 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 "Throttle Air Flow F/B Value" recorded in the freeze frame data with "Throttle Air Flow F/B Value" in the Data List after repairs have been made to save time.

  • Read freeze frame data using the GTS. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2109)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P2109 is output A
      DTC P2109 and other DTCs are output B

      Tech Tips

      If any DTCs other than P2109 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Using the GTS, check "Throttle Air Flow F/B Value" in the freeze frame data.

      Click here

      Tech Tips

      Be sure to confirm "Throttle Air Flow F/B Value" in the freeze frame data as it is used when confirming whether the malfunction has been successfully repaired.

      Result
      Proceed to
      NEXT

    NEXT

  3. REMOVE FOREIGN OBJECT (CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY)


    1. Clean off any deposits from the inside of the throttle body with motor assembly.

      A004ANXC10
      *1 Throttle Body with Motor Assembly *2 Bore
      *3 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 carbon from the valve and bore using a cloth soaked in non-residue solvent.

        Note


        • 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 valve, be careful not to remove it.

        • Push the throttle valve open gently with your finger and check that the throttle valve moves smoothly.

        Tech Tips

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

      Result
      Proceed to
      NEXT

    NEXT

  4. READ VALUE USING GTS (THROTTLE AIR FLOW F/B VALUE)


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

      Click here

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Air Flow F/B Value.

    6. Read the value.

      OK
      The value is half of "Throttle Air Flow F/B Value" recorded in the freeze frame data or less.

      Tech Tips

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

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here