DTC Code | DTC Name |
---|---|
P2102 | Throttle Actuator Control Motor Circuit Low |
P2103 | Throttle Actuator Control Motor Circuit High |
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 driver inputs.
Tech Tips
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
P2102 | Both of the following conditions continue for 2.0 seconds (1 trip detection logic): (a) The throttle actuator drive duty cycle is 80% or higher. (b) The throttle actuator current is less than 0.5 A. |
|
P2103 | Either of the following conditions is met (1 trip detection logic):
|
|
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 function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.
Example:
When the electrical current is less than 0.5 A and the throttle actuator duty ratio exceeds 80%, the ECM interprets this as the current being outside the standard range, illuminates the MIL and stores a DTC.
MONITOR STRATEGY
Required Sensors/Components | Throttle actuator (throttle body with motor assembly) |
Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) and turn the GTS on [A].
Start the engine.
With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].
Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
Read the pending DTCs.
Tech Tips
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 and ECT / Utility / All Readiness.
Input the DTC: P2102 or P2103.
Check the DTC judgment result.
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
Tech Tips
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] and [C] again and, if necessary, drive the vehicle for period of time.
FAIL-SAFE
When either of these DTCs or other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions 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 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 running 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 off.
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Tech Tips
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.
The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the GTS. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
PROCEDURE
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
Inspect the throttle body with motor assembly Click here.
Tech Tips
Perform "Inspection After Repair" after replacing the throttle body with motor assembly Click here.
NG |
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here |
OK |
CHECK HARNESS AND CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM)
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 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
Check for foreign objects between the throttle valve and the housing.
OK |
---|
No foreign objects between the throttle valve and housing. |
Tech Tips
Perform "Inspection After Repair" after cleaning the throttle body with motor assembly Click here.
NG |
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY |
OK |
INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE)
Check if the throttle valve opens and closes smoothly.
OK |
---|
Throttle valve opens and closes smoothly. |
Tech Tips
Perform "Inspection After Repair" after replacing the throttle body with motor assembly Click here.
NG |
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here |
OK |
REPLACE ECM Click here