Code No. P0500: Vehicle Speed Signal System


FUNCTION



  • The engine-ECU receives vehicle speed signal from ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC> via the CAN communication.

TROUBLE JUDGMENT


Check Conditions
  • CAN communication is normal
  • Battery positive voltage is more than 11 V and is less than 16.5 V.
Judgement Criterion
  • The vehicle speed information from ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC> is abnormal for 2 seconds.
FAIL-SAFE AND BACKUP FUNCTION
  • None.

PROBABLE CAUSES



  • Failed wheel speed sensor of ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>.
  • Failed ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

  • Confirm the diagnosis code is set from ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>.

Q. Is the diagnosis code set?
Perform troubleshooting of the anti-lock brake system (ABS) or the active stability control (ASC) system (Refer to GROUP 35B - Troubleshooting <Vehicles with ABS>, Refer to GROUP 35C - Diagnosis Code Chart <Vehicles with ASC>).
Go to Step 2.

STEP 2. Check the speedometer.

Q. Is the indication of speedometer normal?
Go to Step 3.
Replace the ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>.

STEP 3. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).