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.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine.
- 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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DTC Logic
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