P1574 ascd vehicle speed sensor location

The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combination meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control. Refer to EC-47, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description" for ASCD functions.

DTC Description

DTC DETECTION LOGIC

DTC No.CONSULT screen terms (Trouble diagnosis content)DTC detecting conditionP1574ASCD VHL SPD SEN (ASCD VHL SPD SEN)ECM detects a difference between two vehicle speed signals is out of the specified range.

POSSIBLE CAUSE

Harness or connectors (CAN communication line is open or shorted.)
ABS actuator and electric unit (control unit)
TCM
ECM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.CHECK DTC PRIORITY

If DTC P1574 is displayed with DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or P060B, first perform the trouble diagnosis for DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or P060B.

What is ASCD vehicle speed sensor?

P1574 1574 ASCD vehicle speed sensor ECM detects a difference between two vehicle speed signals is out of the specified range. (The CAN communication line is open or shorted.)

What is the function of vehicle speed sensor?

A wheel speed sensor (WSS) or vehicle speed sensor (VSS) is a type of tachometer. It is a sender device used for reading the speed of a vehicle's wheel rotation. It usually consists of a toothed ring and pickup.