General Information

Component Location





General Description

The Electronic Throttle Control (ETC) system consists of Accelerator Position Sensor (APS) and the Throttle Body. The Throttle Body houses the Throttle Position Sensor (TPS) and the Throttle Motor. The APS signals track the movement of the accelerator pedal. The ECM uses the APS signals (driver's input) to give commands to the throttle motor which moves the throttle plate. The ECM uses the TPS signals as a feed back signal to know what the throttle angle is.

DTC Description

Checking output signals from APS 1 under detecting condition, if output signals are above the threshold, ECM sets P2123.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig 1) Normal waveform of APS1 & APS2 with acceleration

Signal waveform of APS 1 & 2 shows that APS 2 increases voltage just half of APS 1 voltage increase when accelerating.