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DTC P0776: Abnormality in Secondary Pressure Solenoid Valve Function


DIAGNOSTIC FUNCTION


TCM conducts fault detection by measuring the difference between the target value and the actual value for the secondary pressure.

JUDGEMENT CRITERIA


The following three conditions are met for three seconds.

  1. Engine speed is 450 r/min or more.
  2. Power supply voltage is 10 volts or more.
  3. Difference between target secondary pressure and actual secondary pressure is 1.20 MPa (174 psi) or more.

PROBABLE CAUSES



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 Data List Reference 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 test diagnosis table.

STEP 5. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?
Intermittent malfunction
Replace TCM.