Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fse Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 or P2112)
INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE)
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 |
SYSTEM 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 in order that it can control the throttle actuator, and therefore the 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 | ECM signals throttle actuator to close, but stuck (1 trip detection logic) |
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| P2112 | ECM signals throttle actuator to open, but stuck (1 trip detection logic) |
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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.If the malfunction is not repaired successfully, a DTC is set 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, as well as other DTCs relating to ETCS (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 off, 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 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 to off.
WIRING DIAGRAM
Refer to DTC P2102 on page Click here.INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 or P2112) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Enter the following menus: Power train / Engine / DTC.
Read 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.
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| A | |
| 2.INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) |
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.
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| OK | |
| 3.CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Clear DTCs (Click here).
Start the engine, and fully depress and release the accelerator pedal quickly (to fully open and close the throttle valve).
Enter the following menus: Power train / Engine / DTC.
Read DTCs.
- Result:
Display (DTC Output) Proceed to No DTC A P2111 or P2112 B
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| A | ||
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