Code No. P0971: Malfunction of the Primary Pressure Solenoid Valve (open circuit / short to power supply)


DIAGNOSTIC FUNCTION


The CVT-ECU monitors the primary pressure solenoid valve circuit for open or short to power supply.

JUDGEMENT CRITERIA



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check the following connector

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

Q. Is the check result normal?
Go to Step 2.
Repair the defective connector(s).

STEP 2. Check for open circuit or short to power supply in PRLS line between the CVT assembly connector and the CVT-ECU connector

Q. Is the check result normal?
Go to Step 3.
Repair the wiring harness.

STEP 3. Primary pressure solenoid valve check
Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace the CVT assembly.

STEP 4. Symptom recheck after erasing diagnosis code

Q. Is the diagnosis code stored?
Replace the CVT-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions .).