Code No. P0776: Abnormality in Secondary Pressure Solenoid Valve Function


DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA




  1. Engine speed is 450 r/min or more.
  2. Power supply voltage is 10 V or more.
  3. Difference between target secondary pressure and actual secondary pressure is 1.20 MPa for 3 seconds continuously.

PROBABLE CAUSES



  • Trouble in CAN bus system
  • Abnormal line pressure
  • 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.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Diagnosis Code Chart ).

STEP 2. Check other diagnosis codes.

Q. Are other diagnosis codes set?
Carry out the appropriate troubleshooting.
Go to Step 3.

STEP 3. M.U.T.-III data list
Item 19: Secondary pressure (Refer to Service Data Table .)

Q. Is the check result normal?
Intermittent malfunction
Go to Step 4.

STEP 4. Line Pressure Check
Carry out "hydraulic test"(Refer to ).

Q. Is the check result normal?
Go to Step 5.
Repair according to the hydraulic pressure diagnosis table.

STEP 5. Symptom recheck after erasing diagnosis code

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