Monitor Description

The ECM uses the throttle position sensor to monitor the throttle valve opening angle.

This sensor includes 2 signals: VTA1*1/VTA*2 and VTA2. VTA1*1/VTA*2 is used to detect the throttle opening angle and VTA2 is used to detect malfunctions in VTA1*1/VTA*2. There are several checks that the ECM performs confirm proper operation of the throttle position sensor and VTA1*1/VTA*2.

There is a specific voltage difference expected between VTA1*1/VTA*2 and VTA2 for each throttle opening angle.

If the voltage output difference of the VTA1*1/VTA*2 and VTA2 deviates from the normal operating range, the ECM interprets this as a malfunction of the throttle position sensor. The ECM will turn on the MIL and a DTC is set.

*1: Except PZEV

*2: PZEV