Code No. P0745: Malfunction of Line Pressure Solenoid Valve


SOLENOID VALVE SYSTEM CIRCUIT



DIAGNOSTIC FUNCTION



JUDGMENT CRITERIA



PROBABLE CAUSES



  • Malfunction of valve body assembly (Faulty line pressure solenoid valve)
  • Damaged wiring harness and connectors
  • Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

  • Item 33: Line pressure solenoid output current
  • Item 32: Line pressure solenoid monitoring current
OK: Check if the output current and monitoring current differ largely.

Q. Is the check result normal?
Intermittent malfunction
Go to Step 2.

STEP 2. Check the following connector:

  • C-136 CVT-ECU connector
  • B-119 CVT assembly connector
Check the terminals for a contact status problem and internal short circuit.

Q. Is the check result normal?
Go to Step 3.
Repair the defective connector.

STEP 3. Check for open circuit and short to earth in the wiring harness between the CVT-ECU connector and the CVT assembly connector.
Between C-136 CVT-ECU connector (terminal No. 1) and B-119 CVT assembly connector (terminal No. 1)

Q. Is the check result normal?
Go to Step 4.
Repair the wiring harness.

STEP 4. Line pressure solenoid valve single unit check
Refer to .

Q. Is the check result normal?
Go to Step 5.
Replace the valve body assembly.

STEP 5. Symptom recheck after erasing diagnosis code

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