ICC Vehicle Speed Sensor

P1574 ICC VEHICLE SPEED SENSOR

Description

The ECM receives two vehicle speed signals via CAN communication line. One is sent from "unified meter and
A/C amp.", and the other is from TCM (Transmission control module). The ECM uses these signals for ICC
control. Refer to "System Description" System Description for ICC functions.


DTC Logic


DTC DETECTION LOGIC

NOTE:
-If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
-If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to "A/T MODELS : DTC Logic" P0500 (A/T models) or "M/T MODELS : DTC Logic" P0500 (M/T
models).
-If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to "DTC Logic" P0605.
-If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to "DTC Logic" P0607.






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 (VDC switch OFF).
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- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK DTC WITH TCM

Check DTC with TCM. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes.
Is the inspection result normal?
YES- GO TO 2.
NO- Perform trouble shooting relevant to DTC indicated.

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

Refer to "CONSULT Function" Scan Tool Testing and Procedures.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace.

3. CHECK DTC WITH "UNIFIED METER AND A/C AMP."

Check combination meter function.
Refer to "CONSULT Function (METER/M&A)" CONSULT Function.
- INSPECTION END