P2111

1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2111: Throttle Actuator Control System - Stuck Open

DTC P2111 - Throttle Actuator Control System - Stuck Open

DTC P2112 - Throttle Actuator Control System - Stuck Closed

DESCRIPTION

The throttle motor is operated by the ECM and it 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 ECM with feedback to control the throttle motor and set the throttle valve angle in response to driver input.
HINT: This Electrical Throttle Control System (ETCS) does not use a throttle cable.





MONITOR DESCRIPTION

The ECM concludes that there is a malfunction of the ETCS when the throttle valve remains at a fixed angle despite high drive current supplying from the ECM. The ECM will turn on the MIL and a DTC is set.

FAIL-SAFE

If the Electronic Throttle Control System (ETCS) has a malfunction, the ECM cuts off current to the throttle control motor. The throttle control valve returns to a predetermined opening angle (approximately 16°) by the force of 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 enable the vehicle to continue to drive.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" condition is detected and then the power switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.

MONITOR DESCRIPTION





TYPICAL ENABLING CONDITIONS

All:





TYPICAL MALFUNCTION THRESHOLDS

P2111:





P2112:





WIRING DIAGRAM





INSPECTION PROCEDURE

Read freeze frame data using 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 Freeze Frame Data.

PROCEDURE

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2111 AND/OR P2112)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Turn the tester ON.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
(e) Read the DTCs.
Result:





HINT: If any other codes besides P2111 and/or P2112 are output, perform troubleshooting for those DTCs first.

B -- GO TO DTC CHART
A -- Continue to next step.

2. INSPECT THROTTLE W/ MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
(a) Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly.
NG -- REPLACE THROTTLE W/ MOTOR BODY ASSEMBLY
OK -- Continue to next step.

3. CHECK IF DTC OUTPUT RECURS (DTC P2111 AND/OR P2112)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Turn the tester ON.
(d) Clear the DTCs DTC Check / Clear.
(e) Put the engine in inspection mode Service Precautions.
(f) Start the engine, and depress and release the accelerator pedal quickly (fully open and fully close).
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
(h) Start the engine, and depress and release the accelerator pedal quickly (fully open and fully close).
(i) Read DTCs.
Result:






B -- REPLACE ECM
A -- CHECK FOR INTERMITTENT PROBLEMS