Code No. P0725: Malfunction of Engine Speed


DIAGNOSTIC FUNCTION



JUDGMENT CRITERIA



  • Locked up with the primary pulley speed of 1,000 r/min or more and with the engine speed of 450 r/min or less
  • CVT-ECU detects the malfunction in the engine speed by comparing it with the primary pulley speed.
  • CAN communication error occurs between engine-ECU and CVT-ECU.

PROBABLE CAUSES



  • Malfunction of the CAN bus
  • Malfunction of the engine system
  • Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 2.
Go to "CAN Troubleshooting."

STEP 2. M.U.T.-III diagnosis code
Check if the engine-related diagnosis code is set.

Q. Is the check result normal?
Go to Step 3.
Go to "Engine Troubleshooting."

STEP 3. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?
Intermittent malfunction
Replace CVT-ECU.