System Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

The throttle actuator is operated by the ECM (Included in HV Control ECU) and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on the throttle body. The TP 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 ETCS (Electronic Throttle Control System) does not use a throttle cable.

DIAGNOSTIC TROUBLE CODE CHART

DTC No.	DTC Detection Condition	Trouble Area
P2102	Conditions (a) and (b) continue for 2.0 seconds (1 trip detection logic): Throttle actuator duty ratio 80 % or more Throttle actuator current 0.5 A or less	Open in throttle actuator circuit Throttle actuator HV Control ECU
P2103	Throttle control motor current 7A or more (0.6 seconds) (1 trip detection logic)	Short in throttle actuator circuit Throttle actuator Throttle valve Throttle body assembly HV Control ECU