Sfi System - P2112

Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

2Uz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Fail-safe

  7. Wiring diagram

  8. Inspection procedure

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

  10. Check throttle body (visually check throttle valve)

  11. 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 it 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. The throttle position sensor provides feedback to the ECM to control the throttle actuator and set the throttle valve angle in response to driver inputs.

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

DTC No.
DTC Detection Conditions
Trouble Areas
P2111
ECM tries to close throttle valve but throttle position is stuck
(1 trip detection logic)
  1. Throttle actuator
  2. Throttle body
  3. Throttle valve
P2112
ECM tries to open throttle valve but throttle position is stuck
(1 trip detection logic)
  1. Throttle actuator
  2. Throttle body
  3. Throttle valve

MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM illuminates the MIL and sets a DTC.

MONITOR STRATEGY


Related DTCs
P2111: Throttle actuator stuck open
P2112: Throttle actuator stuck closed
Required Sensors/Components (Main)
Throttle actuator motor
Required Sensors/Components (Related)
Throttle position sensor
Frequency of Operation
Continuous
Duration
0.5 seconds
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


All:
Monitor will run whenever these DTCs are not present
None

P2111:
System guard*
ON
Throttle actuator current
2 A or more
Duty cycle to close throttle
80 % or more
*: System guard is ON when the following conditions are met
-
Throttle actuator
ON
Throttle actuator duty calculation
Executing
Throttle position sensor
Fail determined
Throttle actuator current-cut operation
Not executing
Throttle actuator power supply
4 V or more
Throttle actuator
Fail determined

P2112:
System guard*
ON
Throttle actuator current
2 A or more
Duty cycle to open throttle
80 % or more
*: System guard is ON when the following conditions are met
-
Throttle actuator
ON
Throttle actuator duty calculation
Executing
Throttle position sensor
Fail determined
Throttle actuator current-cut operation
Not executing
Throttle actuator power supply
4 V or more
Throttle actuator
Fail determined

TYPICAL MALFUNCTION THRESHOLDS


TP sensor voltage change
No change

FAIL-SAFE

When any of these DTCs, as well as other DTCs relating to Electronic Throttle Control System (ETCS) 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 7°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 the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read the 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 RELEVANT DTC CHART
A
next down

2.CHECK THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE)

  1. Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body.
    Also, check that the throttle valve moves smoothly.

    OK:
    No foreign matter between the throttle valve and the housing, and throttle valve can move smoothly.


NGnext
REPLACE THROTTLE BODY
OK
next down

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

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Clear the DTC (Click here).

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

  1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read DTC.

    Result:

    Display (DTC Output)
    		Proceed to
    No DTC
    		A
    P2111 and/or P2112
    		B


Bnext
REPLACE ECM
A
next down
CHECK FOR INTERMITTENT PROBLEMS