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Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 168 (Engine Control System Self Diagnostics (1GR-FE)) >> Diagnostic Tests >> DTC P0505: Idle Control System Malfunction >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

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

The ECM controls the throttle motor to provide the proper throttle valve opening angle for the target idle speed.