P1574

P1574 ASCD Vehicle Speed Sensor

Component Description

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 [SDT Function (AT)] How to Perform Trouble Diagnosis for Quick and Accurate Repair for ASCD functions.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.

The MIL will not light up for this self-diagnosis.

NOTE:

- If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX. Refer to U1001.
- If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to P0607.
- If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to P0500.
- If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to P0605.





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.

TESTING CONDITION:

Step 3 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.

with SDT

1) Start engine.
2) Drive the vehicle at more than 40 km/h (25 MPH).
3) Check DTC.
4) If DTC is detected, go to "Diagnosis Procedure".

With GST

Follow the procedure "WITH SDT" above.

Diagnosis Procedure

1. CHECK DTC WITH TCM

Check DTC with TCM. Refer to Scan Tool Testing and Procedures.

OK or NG
OK
GO TO 2.
NG
Perform trouble shooting relevant to DTC indicated.

2. CHECK DTC WITH "ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)"

Refer to [SDT Function (ABS / ESP(R))] SDT Function (ABS / ESP) (TYPE 1) or [SDT Function (ABS / ESP(R))] SDT Function (ABS / ESP) (TYPE 2).

OK or NG
OK
GO TO 3.
NG
Repair or replace.

3. CHECK COMBINATION METER

Check combination meter function.

Refer to Meter Diagnosis Description.


INSPECTION END