DTC P1720 VSS: Description

NOTE:

If DTC P1720 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to "DTC U1000, U1001 CAN COMMUNICATION LINE ".
If DTC P1720 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to "DTC U1010 CAN COMMUNICATION ".

ECM receives two vehicle speed signals via CAN communication line. One is sent from "ABS actuator and electric unit (control unit)" via "unified meter and A/C amp.", and the other is from TCM (Transmission control module). ECM uses these signals for engine control.