Code No. P0741: Abnormality in Lock-up Function


DIAGNOSTIC FUNCTION



JUDGMENT CRITERIA



PROBABLE CAUSES



  • Abnormal line pressure
  • Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Check other diagnosis codes.

Q. Are other diagnosis codes set?
Carry out the appropriate troubleshooting.
Go to Step 2.

STEP 2. M.U.T.-III data list

  • Item 07: Primary speed
  • Item 09: Engine speed
OK: No considerable difference is observed between the primary pulley speed and the engine speed.

Q. Is the check result normal?
Intermittent malfunction
Go to Step 3.

STEP 3. Line Pressure Check
Carry out "hydraulic test"(Refer to ).

Q. Is the check result normal?
Go to Step 4.
Repair according to the hydraulic pressure diagnosis table.

STEP 4. Symptom recheck after erasing diagnosis code

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