DTC Detection Logic

NOTE:

If DTC P1720 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
If DTC P1720 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to DTC Logic .
If DTC P1720 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to DTC Logic .

DTC No.

Trouble diagnosis content

DTC detecting condition

Possible cause

P1720

Vehicle speed sensor

(TCM output)

The difference between two vehicle speed signals is out of the specified range.

Harness or connectors
(Secondary speed sensor circuit is open or shorted.)

(Wheel sensor circuit is open or shorted.)
TCM
Secondary speed sensor
ABS actuator and electric unit (control unit)
Wheel sensor
Combination meter