TYPICAL MALFUNCTION THRESHOLDS
CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
READ VALUE USING GTS (THROTTLE POSITION)
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY WITH MOTOR ASSEMBLY)
REPLACE THROTTLE BODY WITH MOTOR 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 sensor, which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM so that the ECM 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 No. | DTC Detection Condition | Trouble Area |
| P2111 | Throttle actuator does not close even when the ECM commands it to close (1 trip detection logic). |
|
| P2112 | Throttle actuator does not open even when the ECM commands it to open (1 trip detection logic). |
|
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 a DTC.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.
MONITOR STRATEGY
| Required Sensors/Components | Throttle actuator |
| Frequency of Operation | Continuous |
TYPICAL ENABLING CONDITIONS
| Throttle actuator | ON |
| Throttle actuator duty calculation | Executing |
| Throttle position sensor failure | Not detected |
| Throttle actuator current-cut operation | Not executing |
| Throttle actuator power supply | 4 V or higher |
| Throttle actuator failure | Not detected |
| All of following conditions met | - |
| Throttle actuator current | 2 A or higher |
| Duty cycle to close throttle | 80% or more |
| All of following conditions met | - |
| Throttle actuator current | 2 A or higher |
| Duty cycle to open throttle | 80% or more |
TYPICAL MALFUNCTION THRESHOLDS
| Throttle position sensor voltage | No change |
CONFIRMATION DRIVING PATTERN
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the GTS on [A].
- Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
- Read the pending DTCs.
- HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P2111 or P2112.
- 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
- HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- DTC judgment completed
- If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [B] again and, if necessary, drive the vehicle for a period of time.
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 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 position 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.The ECM continues operating in fail-safe mode until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
Refer to DTC P2102 (LandCruiser RM000000PFU0Z5X_07.html).INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the GTS. 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.
| 1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the 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.
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| A | |
| 2.INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) |
Check for contamination between the throttle valve and housing. If necessary, clean the throttle body. Also, check that the throttle valve moves smoothly.
- OK:
- Throttle valve is not contaminated with foreign objects and moves smoothly.
|
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| OK | |
| 3.READ VALUE USING GTS (THROTTLE POSITION) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (LandCruiser RM000000VNG00DX.html).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.
Check the values displayed on the GTS while wiggling the ECM wire harness.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
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
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| A | |
| 4.REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY WITH MOTOR ASSEMBLY) |
As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector (LandCruiser RM000003YMI00MX.html).
| NEXT | ||
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| 5.REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |
Replace the throttle body with motor assembly (LandCruiser RM000000VWO038X.html).
- HINT:
- Perform "Inspection After Repair" after replacing the throttle body (LandCruiser RM000004NJC03XX.html).
| NEXT | |
| 6.CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (LandCruiser RM000000VNG00DX.html).
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Result Result Proceed to No DTC is output A P2111 or P2112 is output B
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| A | ||
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