Electronic Control Module (ECM)

The TAC module is the control center for the electronic throttle system. The TAC module is located inside the ECM and is not serviceable separately. The TAC module and the ECM monitor the commanded throttle position and compare it to the actual throttle position. This is accomplished by monitoring the APP and the TP sensors. These values must be within a calibrated value of each other. The ECM module also monitors each individual circuit of the TP sensor and the APP to verify proper operation.