P1574

Description

The VCM receives two vehicle speed sensor signals via CAN communication. One is sent from the electrically-driven intelligent brake unit, and the other is from the traction motor inverter (motor speed signal). The
VCM uses these signals for ASCD control. Refer to "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description" Automatic Speed Control Device (ASCD) for ASCD functions.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

- Turn power switch OFF and wait at least 20 seconds.
- Make sure that 12V battery voltage is 11 V or more.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Set the vehicle to READY.
2.Push the VDC OFF switch to stop the VDC control.
3.Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION:
Always drive vehicle at a safe speed.
4.Check self-diagnostic result.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK DTC IN TRACTION MOTOR INVERTER

Check DTC in traction motor inverter.
Is the inspection result normal?
YES- GO TO 2.
NO- Check the DTC.

2. CHECK DTC IN ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

Check DTC in electrically-driven intelligent brake unit.
Is the inspection result normal?
YES- GO TO 3.
NO- Check the DTC.

3. CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace VCM. Refer to "Removal and Installation" Removal And Installation.
NO- Repair or replace error-detected parts.