Troubleshooting

DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW*

*: Only for sequential manual transmission vehicle.

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The throttle motor is operated by the ECM and it opens and closes the throttle valve.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body. It provides feedback to the ECM to control the throttle motor in order to maintain the throttle valve opening angle properly in response to the driving condition.

If this DTC is stored, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring.

However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Condition:

Typical Malfunction Thresholds:

The ECM monitors the current flowing through the throttle motor and detects malfunctions and/or an open circuit in the throttle motor based on these measurements. When the current deviates from the normal range, the ECM interprets this as a malfunction in the throttle motor and sets a DTC.

If the ECM determines that the Electronic Throttle Control System (ETCS) is malfunctioning, it shuts off the power to the throttle motor, the throttle valve is closed by the return spring, and the throttle valve is locked at a certain operating angle. At the same time, operation of the ECTS is cancelled until the system returns to normal or the ignition switch is turned to OFF.

Wiring Diagram:

Step 1:

Step 2 - 3:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is 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.