Code No. P0868: Secondary Pressure Drop


SECONDARY PRESSURE SENSOR SYSTEM CIRCUIT


Refer to .

DIAGNOSTIC FUNCTION


CVT-ECU detects the secondary pressure drop during driving.

JUDGMENT CRITERIA


The value obtained by subtracting the actual secondary pressure sensor reading from the target secondary pressure sensor reading is 0.25 MPa or more.

PROBABLE CAUSES



DIAGNOSTIC PROCEDURE

STEP 1. Check other diagnosis codes.

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

STEP 2. Check the following connector:

  • B-119 CVT assembly connector
  • C-135 CVT-ECU connector
  • A-63 Intermediate connector
Check contacts for internal short circuit.

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

STEP 3. Check for short to earth in the wiring harness between the CVT-ECU connector and the CVT assembly connector.

  • Between C-135 CVT-ECU connector (terminal No. 39) and B-119 CVT assembly connector (terminal No. 7)
OK: 100Ω or more

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

STEP 4. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?
Intermittent malfunction
Replace the CVT-ECU, and then go to Step 5.

STEP 5. Retest the system.

Q. Is the check result normal?
The inspection is complete.
Replace the CVT assembly.