M20F-FXS, M20G-FXS ENGINE CONTROL SFI SYSTEM P211172 Throttle Actuator "A" Control System Actuator Stuck Open P211173 Throttle Actuator "A" Control System Actuator 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 built into 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 a request from the hybrid system.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| P211172 | Throttle Actuator "A" Control System Actuator 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 | SAE Code: P2111 |
| P211173 | Throttle Actuator "A" Control System Actuator 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 | SAE Code: P2112 |
MONITOR DESCRIPTION
If the throttle valve remains at a certain angle despite a high drive current from the ECM, the ECM determines that there is a malfunction in the Electronic Throttle Control System (ETCS), 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
| All of the following conditions are met | - |
| System guard* judge condition | On |
| Throttle actuator current | 2 A or higher |
| Duty-cycle to close throttle | 80% or higher |
| All of the following conditions are met | - |
| System guard* judge condition | On |
| Throttle actuator current | 2 A or higher |
| Duty-cycle to open throttle | 80% or higher |
| *: 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 higher |
| Throttle actuator fail | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
| Throttle position sensor voltage | No change |
| Throttle position sensor voltage | No change |
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
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 [A].
Turn the GTS on.
Put the engine in Inspection Mode (Maintenance Mode).
Start the engine and fully depress and release the accelerator pedal quickly (to open and close the throttle valve) [B].
- HINT:
-
During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform step [B] after charge control has completed.
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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 / Utility / All Readiness.
Input the DTC: P211172 or P211173.
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 |
- HINT:
- ·
If the judgment result is NORMAL, the system is normal.
·If the judgment result is ABNORMAL, the system is malfunctioning.
·[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
·When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
FAIL-SAFE
When these DTCs 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 7.5° throttle valve opening angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. 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
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
(Select Powertrain in Health Check and then check the time stamp data.)
·If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
- HINT:
- ·
Refer to "Data List / Active Test" [Throttle Position Sensor No.1 Voltage, Throttle Position Sensor No.2 Voltage, Throttle Position Command, Throttle Motor Current, Throttle Motor Duty Ratio (Open) and Throttle Motor Duty Ratio (Close)].
·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.
PROCEDURE
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTC P211172 or P211173 is output A DTC P211172 or P211173 and other DTCs are output B
- HINT:
-
If any DTCs other than P211172 or P211173 are output, troubleshoot those DTCs first.
A
B
Check for foreign matter 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.
- HINT:
-
Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.
- Result:
Proceed to OK NG
OK
NG
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the ignition switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
NEXT
Enter the following menus.
- Powertrain > Engine > Data List
-
Tester Display Throttle Position Sensor No.1 Voltage Throttle Position Sensor No.2 Voltage Throttle Position Command - 50003 372 75,76,83
Read the values displayed on the GTS while wiggling the ECM wire harness.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- 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
- HINT:
-
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
- Result:
Proceed to NEXT
NEXT
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the ignition switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
NEXT
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Read the DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTCs are not output A DTC P211172 or P211173 is output B
A
B