P1720

DTC P1720 VEHICLE SPEED SENSOR (A/T OUTPUT)

Description

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

ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from VDC/TCS/ABS control unit, and the other is from TCM (Transmission control module). ECM uses these two signals for engine control.

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

DTC Confirmation Procedure

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

WITH CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine.
4. Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without brake pedal depressing.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure".

WITH GST
Follow the procedure "WITH CONSULT-II" above.

Diagnostic Procedure Step 1 - 3:

Diagnostic Procedure