Brand:

Toyota

Model Name:

Yaris NCP90 91 92 93

Manual:

Repair Manual

Section:

1Nz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Fail-safe

  3. Wiring diagram

  4. Inspection procedure

  5. Check any other dtcs output (in addition to dtc p2111 or p2112)

  6. Inspect throttle body assembly (visually check throttle valve)

  7. Check whether dtc output recurs (dtc p2111 or p2112)

DTC P2111 Throttle Actuator Control System - Stuck Open

DTC P2112 Throttle Actuator Control System - Stuck Closed


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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 (TP) sensor, which is mounted on the throttle body assembly. The TP sensor provides feedback to the ECM in order that it can control the throttle actuator, and therefore the throttle valve, appropriately in response to driver inputs.

HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.

DTC No.
DTC Detection Conditions
Trouble Areas
P2111
Throttle actuator does not close when signaled by ECM
(1 trip detection logic)
  1. Throttle actuator
  2. Throttle body assembly
  3. Throttle valve
P2112
Throttle actuator does not open when signaled by ECM
(1 trip detection logic)

FAIL-SAFE

When either of these DTCs, or other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6° throttle 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 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 P2102 (Click here).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. 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.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.

    Result:
    Display (DTC Output)
    		Proceed To
    P2111 or P2112
    		A
    P2111 or P2112 and other DTCs
    		B
    HINT:
    If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first.


Bnext
GO TO DTC CHART (Click here)
A
next down

2.INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

  1. Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body assembly. And check that the throttle valve moves smoothly.

    OK:
    Throttle valve is not contaminated with foreign objects and moves smoothly.


NGnext
REPLACE THROTTLE BODY ASSEMBLY (Click here)
OK
next down

3.CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear DTCs (Click here).

  1. Start the engine, and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).

  1. Select the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.

    Result:
    Display (DTC Output)
    		Proceed To
    No DTC
    		A
    P2111 or P2112
    		B


Bnext
REPLACE THROTTLE BODY ASSEMBLY (Click here)
A
next down
CHECK FOR INTERMITTENT PROBLEMS (Click here)