Monitor Description

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

This sensor includes two signals: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and VTA2 is used to detect malfunction in VTA1. There are several checks that the ECM performs to confirm proper operation of the throttle position sensor and VTA1.

The output voltage difference between VTA1 and VTA2 multiplied by 0.8 (corrected by learning value) should be more than 0.8V and less than 1.6 V. If the voltage output difference deviates from this range, the ECM concludes the throttle position sensor has a malfunction. The ECM will turn on the MIL and a DTC is set.