2NZ-FE ENGINE CONTROL SFI SYSTEM P2111 Throttle Actuator Control System - Stuck Open 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 with motor assembly. 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 (ETCS) does not use a throttle cable.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2111 | Throttle Actuator Control System - Stuck Open | The ECM signals the throttle actuator to close, but the actuator is stuck (1 trip detection logic). | ·
Throttle actuator ·
Throttle body with motor assembly ·
Throttle valve ·
Wire harness or connector ·
ECM |
Comes on | DTC stored |
| P2112 | Throttle Actuator Control System - Stuck Closed | The ECM signals the throttle actuator to open, but the actuator is stuck (1 trip detection logic). | ·
Throttle actuator ·
Throttle body with motor assembly ·
Throttle valve ·
Wire harness or connector ·
ECM |
Comes on | DTC stored |
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 then illuminates the MIL and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Throttle actuator (throttle body with motor assembly) |
| Frequency of Operation | Continuous |
TYPICAL ENABLING CONDITIONS
| 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 higher |
| Throttle actuator fail | Not detected |
| Both of the following conditions are met | - |
| Throttle actuator current | 2 A or higher |
| Duty-cycle to close throttle | 80% or higher |
| Both of the following conditions are met | - |
| Throttle actuator current | 2 A or higher |
| Duty-cycle to open throttle | 80% or higher |
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 procedure).
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.
·If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again and, if necessary, drive the vehicle for period of time.
FAIL-SAFE
When any of these DTCs or other DTCs relating to Electronic Throttle Control System (ETCS) 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 valve opening 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 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 hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>P2102
CAUTION / NOTICE / HINT
- HINT:
- ·
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.
·Refer to "Data List / Active Test" [Throttle Position No.1, Throttle Position Command, Throttle Motor Current, Throttle Motor Duty (Open), Throttle Motor Duty (Close)].
Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>DATA LIST / ACTIVE TEST
PROCEDURE
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.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- 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.
A
B
Check for contamination between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also check that the throttle valve moves smoothly.
- OK:
Throttle valve is not contaminated with foreign matter and moves smoothly.
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
- Powertrain > Engine and ECT > Clear DTCs
- 50002 234
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Throttle Position No.1, Throttle Position No.2 and Throttle Position Command.
- Powertrain > Engine and ECT > Data List
-
Tester Display Throttle Position No.1 Throttle Position No.2 Throttle Position Command - 50003 234 282,283,277
Read the values displayed on the GTS while wiggling the ECM wire harness.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- Result:
Result Proceed to Value in Data List changes when wire harness is wiggled, or DTC is output A Other than above B
A
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.
- Result:
Proceed to NEXT
NEXT
Replace the throttle body with motor assembly.
Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>THROTTLE BODY>REMOVAL
- Result:
Proceed to NEXT
NEXT
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
- Powertrain > Engine and ECT > Clear DTCs
- 50002 234
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
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.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- Result:
Result Proceed to DTCs are not output A DTC P2111 or P2112 is output B
A
B