Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P1574 ASCD vehicle speed sensor
DTC Logic

DTC DETECTION LOGIC

NOTE:

  • If DTC P1574 is displayed with DTC U1001, first perform the trouble diagnosis for DTC U1001. Refer to EC, "DTC Logic".
  • If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to EC, "DTC Logic"
  • If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC, "DTC Logic"
  • If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to EC, "DTC Logic".
DTC No. Trouble diagnosis (Trouble diagnosis content) DTC detecting condition Possible cause
P1574 ASCD VHL SPD SEN (ASCD vehicle speed sensor) ECM detects a difference between two vehicle speed signals is out of the specified range.
  • Harness or connectors (CAN communication line is open or shorted.)
  • ABS actuator and electric unit (control unit)
  • TCM
  • ECM

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine.
  2. Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION: Always drive vehicle at a safe speed.

NOTE: This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.

If a road test is expected to be easier, it is unnecessary to lift the vehicle.

    3.   Check DTC.

Is DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> INSPECTION END

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