TYPICAL MALFUNCTION THRESHOLDS
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)
INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE)
READ VALUE USING TECHSTREAM (THROTTLE POSITION)
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY)
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 an electric motor and 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. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.- HINT:
- This electronic throttle control system does not use a throttle cable.
| DTC No. | DTC Detection Condition | Trouble Area |
| P2111 | ECM signals throttle actuator to close, but the actuator is stuck (1 trip detection logic) |
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| P2112 | ECM signals throttle actuator to open, but the actuator is stuck (1 trip detection logic) |
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MONITOR DESCRIPTION
The ECM determines that there is a malfunction in the electronic throttle control system 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.MONITOR STRATEGY
| Related DTCs | P2111: Throttle actuator stuck open P2112: Throttle actuator stuck closed |
| Required Sensors/Components (Main) | Throttle actuator (throttle body) |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Continuous |
| Duration | 0.5 seconds |
| MIL Operation | Immediate |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs are not present | None |
| All of following conditions are met: | - |
| System guard* judge condition | On |
| Throttle actuator current | 2 A or more |
| Duty cycle to close throttle | 80% or more |
| All of following conditions are met: | - |
| System guard* judge condition | On |
| Throttle actuator current | 2 A or more |
| Duty cycle to open throttle | 80% or more |
| *System guard set when following conditions are met | - |
| Throttle actuator | On |
| Throttle actuator duty calculation | Executing |
| Throttle position sensor fail | Not detected |
| Throttle actuator current-cut operation | Not executing |
| Throttle actuator power supply | 4 V or more |
| Throttle actuator fail | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
| Throttle position sensor voltage | No change |
| Throttle position sensor voltage | No change |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the Techstream 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.
Techstream 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 is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (COROLLA_ZRE142 RM000000PDK0ZBX.html).
- HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
FAIL-SAFE
When either of these DTCs, as well as other DTCs relating to electronic throttle control system malfunctions, is set, 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 6.5° 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 running at a minimal speed. If the accelerator pedal is depressed 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 (Link).INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the Techstream. 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) |
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Result:
Result Proceed to DTC P2111 or P2112 is output A DTC 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 (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 TECHSTREAM (THROTTLE POSITION) |
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs (COROLLA_ZRE142 RM000000PDK0ZBX.html).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.
Check the values displayed on the Techstream 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) |
As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector (COROLLA_ZRE142 RM000000UZ30C8X.html).
| NEXT | ||
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| 5.REPLACE THROTTLE BODY |
Replace the throttle body (COROLLA_ZRE142 RM0000017UC03CX.html).
| NEXT | |
| 6.CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) |
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs (COROLLA_ZRE142 RM000000PDK0ZBX.html).
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Result:
Result Proceed to No output A P2111 or P2112 B
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| A | ||
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