Troubleshooting

DTC P2119 THROTTLE ACTUATOR CONTROL THROTTLE BODY RANGE/PERFORMANCE*

*: Only for sequential manual transmission vehicle.

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The idle speed is controlled by the Electric Throttle Control System (ETCS).

The ETCS is composed of: 1) the throttle motor, which operates the throttle valve; 2) the magnetic clutch, which connects the throttle motor with the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the ETCS and 6) a one valve type throttle body.

The throttle position sensor, which is mounted on the throttle body, detects the opening angle of the throttle valve, and it provides feedback to the ECM to control the throttle motor.

If the ETCS has malfunction, 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 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. It provides feedback to the ECM so that the ECM can control the throttle motor and the throttle valve opening angle properly in response to driver inputs. The ECM determines the "actual" throttle angle based on the throttle position sensor signal. The "actual" throttle position is compared to the "target" throttle position commanded by the ECM. If the difference of these two values exceeds a specified limit, the ECM interprets this as a malfunction in the ETCS. The ECM turns on the MIL and a DTC is set.

If the ECM judges that the 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 OFF.

Wiring Diagram:

Step 1 - 2:

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.