Diagnostic trouble code P2111 P2112 3UR-FE Land Cruiser

DESCRIPTION

MONITOR DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION))

REPLACE THROTTLE BODY ASSEMBLY

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

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. The TP sensor provides feedback to the ECM so that it can control the throttle actuator (throttle valve) appropriately in response to driver inputs.

HINT:

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

DTC Code DTC Detection Condition Trouble Area
P2111 The throttle actuator does not close when signaled by the ECM (1 trip detection logic).
  1. Throttle actuator
  2. Throttle body assembly
  3. Throttle valve
P2112 The throttle actuator does not open when signaled by the ECM (1 trip detection logic).
  1. Throttle actuator
  2. Throttle body assembly
  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 stores DTC(s). If the malfunction is not repaired successfully, a DTC is stored when the accelerator pedal is fully depressed and released quickly (to fully open and close the throttle valve) after the engine is next started.

FAIL-SAFE

When either of these DTCs, or other DTCs relating to ETCS (Electronic Throttle Control System) 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 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 engine switch is then turned off.

Wiring diagram

Refer to DTC P2102 ( onclick="javascript:openSeePage('seepage', 'RM000000PFU0M5X_07');return false;">Click here).

Inspection procedure

HINT:

  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition 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.
  2. Refer to "Data List / Active Test" [Throttle Position Command, Throttle Position No. 1, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)] .

1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.

    Result
    Result Proceed to
    P2111 or P2112 is output A
    P2111 or P2112 and other DTCs are output B

    HINT:

    If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first.

  B  
GO TO DTC CHART
 
A  
   

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. And check that the throttle valve moves smoothly.

    OK:

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

  NG  
Go to step 4
 
OK  
   

3.READ VALUE USING INTELLIGENT TESTER (THROTTLE POSITION))

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester on.

  1. Clear DTCs .

  1. Turn the engine switch off and wait for at least 30 seconds.

  1. Turn the engine switch on (IG).

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.

  1. Check the values displayed on the tester while wiggling the ECM wire harness.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Check for DTCs.

    Result
    Result Proceed to
    Value in Data List changes when wire harness is wiggled, or DTC is output* A
    Other than above B
    *: As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector .
  B  
Go to step 5
 
A  
   
REPAIR OR REPLACE HARNESS OR CONNECTOR

4.REPLACE THROTTLE BODY ASSEMBLY

  1. Replace the throttle body assembly .

NEXT  
   

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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester on.

  1. Clear DTCs .

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

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.

    Result
    Result Proceed to
    No DTC is output A
    P2111 or P2112 is output B
  B  
REPLACE ECM
 
A  
   
END