- Throttle actuator
| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM000000PFV02RX |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2111,P2112; Throttle Actuator Control System - Stuck Open; 2007 MY LX470 [08/2006 - ] | ||
|
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 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 feedback to the ECM to control the throttle actuator and set the throttle valve angle in response to driver inputs.
HINT:
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
|
DTC No. |
DTC Detection Conditions |
Trouble Areas |
|---|---|---|
|
P2111 |
ECM tries to close throttle valve but throttle position is stuck (1 trip detection logic) |
|
|
P2112 |
ECM tries to open throttle valve but throttle position is stuck (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 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.
MONITOR STRATEGY
|
Related DTCs |
P2111: Throttle actuator stuck open P2112: Throttle actuator stuck closed |
|
Required Sensors/Components (Main) |
Throttle actuator, throttle valve, throttle position sensor |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
0.5 seconds |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor will run whenever these DTCs are not present |
None |
P2111 (Throttle actuator stuck open):
|
All of following conditions are met |
- |
|
System guard* |
ON |
|
Throttle actuator current |
2 A or more |
|
Throttle actuator close duty ratio |
80% or more |
P2112 (Throttle actuator stuck closed):
|
All of following conditions are met |
- |
|
System guard* |
ON |
|
Throttle actuator current |
2 A or more |
|
Throttle actuator open duty-cycle |
80% or more |
|
*System guard set when following conditions met |
- |
|
Throttle actuator |
ON |
|
Throttle actuator duty calculation |
Executing |
|
Throttle position sensor |
Fail determined |
|
Throttle actuator current-cut operation |
Not executing |
|
Throttle actuator power supply |
4 V or more |
|
Throttle actuator |
Fail determined |
TYPICAL MALFUNCTION THRESHOLDS
P2111 (Throttle actuator stuck open):
|
TP sensor voltage change |
No change |
P2112 (Throttle actuator stuck closed):
|
TP sensor voltage change |
No change |
FAIL-SAFE
When any of these DTCs, as well as other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions, are 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 7°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 ignition switch is then turned OFF.
WIRING DIAGRAM
Refer to DTC P2102
![2007 MY LX470 [08/2006 - ]; 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; Throttle Actuator Control Motor Circuit Low+](../../../../stylegraphics/info.gif "2007 MY LX470 [08/2006 - ]; 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; Throttle Actuator Control Motor Circuit Low+")
.
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 running or stopped, 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.
PROCEDURE
|
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112) |
(a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
(b) Turn the ignition switch ON and turn the intelligent tester ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(d) Read the DTCs.
|
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.
| B |
|
|
|
2. |
CHECK THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) |
(a) Check for foreign matter between the throttle valve and housing. If necessary, clean the throttle body.
Also, check that the throttle valve moves smoothly.
OK:
No foreign matter between the throttle valve and the housing, and throttle valve can move smoothly.
| NG |
|
|
|
3. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112) |
(a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
(b) Turn the ignition switch ON and turn the intelligent tester ON.
(c)
Clear the DTC
.
(d) Start the engine, and depress and release the accelerator pedal quickly (fully open and close the throttle valve).
(e) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(f) Read DTC.
|
Display (DTC Output) |
Proceed to |
|---|---|
|
No DTC |
A |
|
P2111 and/or P2112 |
B |
| B |
|
| A |
|
|
|