M20F-FXS, M20G-FXS ENGINE CONTROL SFI SYSTEM P210018 Throttle Actuator "A" Control Motor Circuit Current Below Threshold P210019 Throttle Actuator "A" Control Motor Circuit Current Above Threshold
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 a request from the hybrid system.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| P210018 | Throttle Actuator "A" Control Motor Circuit Current Below Threshold | Both of the following conditions are met for 2 seconds or more (1 trip detection logic):
·
The throttle actuator drive duty cycle is 80% or higher. ·
The throttle actuator current is less than 0.5 A. |
·
Open or short in throttle actuator circuit ·
Throttle actuator ·
ECM |
Comes on | SAE Code: P2102 |
| P210019 | Throttle Actuator "A" Control Motor Circuit Current Above Threshold | Either of the following conditions is met (1 trip detection logic):
·
A motor driver IC high current limiter monitor input malfunction is detected. ·
A motor driver IC high current inhibit signal is received. |
·
Open or short in throttle actuator circuit ·
Throttle actuator ·
Throttle valve ·
Throttle body with motor assembly ·
ECM |
Comes on | SAE Code: P2103 |
MONITOR DESCRIPTION
The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not operate properly (for example, it is stuck open), the ECM will determines there is a malfunction, illuminate the MIL and store a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Throttle actuator (throttle body with motor assembly) |
| Frequency of Operation | Continuous |
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.
With the vehicle stationary, fully depress the accelerator pedal and quickly release it [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.
Check that 16 seconds or more have elapsed since the accelerator pedal was first depressed.
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: P210018 or P210019.
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.
·If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
·[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 this DTC is 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 then adjusts the engine output, by controlling the fuel injection (intermittent fuel cut) and ignition timing, in accordance with the engine torque request signal sent from the hybrid vehicle control ECU assembly, to allow the vehicle to continue being driven 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
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:
- ·
The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty Ratio (Open) / Throttle Motor Duty Ratio (Close)) can be read using the GTS. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
·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
- HINT:
-
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
- Result:
Proceed to OK NG
OK
NG
Disconnect the throttle body with motor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C19-6 (M+) - C141-2 (M+) Always Below 1 Ω C19-5 (M-) - C141-1 (M-) Always Below 1 Ω C19-6 (M+) or C141-2 (M+) - Body ground and other terminals Always 10 kΩ or higher C19-5 (M-) or C141-1 (M-) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Check for foreign matter between the throttle valve and the housing.
- OK:
No foreign matter between the throttle valve and housing.
- HINT:
-
Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.
- Result:
Proceed to OK NG
OK
NG
Check if the throttle valve opens and closes smoothly.
- OK:
Throttle valve opens and closes smoothly.
- HINT:
-
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
- Result:
Proceed to OK NG
OK
NG