DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High [09/2014 - 11/2017]: Description

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

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.

HINT:

This Electronic Throttle Control System (ETCS) does not use a throttle cable.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P2102	Throttle Actuator Control Motor Circuit Low	Both of the following conditions are met 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.	Open in throttle actuator circuit Throttle actuator ECM	Comes on	DTC stored
P2103	Throttle Actuator Control Motor Circuit High	Either of the following conditions is met (1 trip detection logic): A motor driver IC high current limiter monitor input failure. A motor driver IC high current inhibit signal on.	Short in throttle actuator circuit Throttle actuator Throttle valve Throttle body with motor assembly ECM	Comes on	DTC stored