[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
23 -AUTOMATIC TRANSMISSION > 23A-CVT > TROUBLESHOOTING<CVT><CVT> > DIAGNOSIS CODE PROCEDURES > CODE NO. P0970 PRIMARY PRESSURE SOLENOID MALFUNCTION
Code No. P0970: Malfunction of Primary Pressure Solenoid Valve (low input)
 
 
 
 
DIAGNOSTIC FUNCTION
If a predetermined current does not flow into the primary pressure solenoid valve (short to earth), the CVT-ECU will determine the system is defective.
 
 
JUDGEMENT CRITERIA
The solenoid valve drive circuit remains short to earth for 0.48 seconds.
 
 
PROBABLE CAUSES
  • Malfunction of the valve body assembly (Faulty primary pressure solenoid valve)
  • Damaged wiring harness and connectors
  • Malfunction of CVT-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Check for short to earth in PRLS line between the CVT assembly connector and the CVT-ECU connector
Is the check result normal?
Go to Step 2.
Repair the connector(s) or the wiring harness.
 
STEP 2. Primary pressure solenoid valve check
Refer to .
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check for short to earth in power supply line between the CVT assembly connector and the valve body harness connector (primary pressure solenoid valve line)
Refer to .
Is the check result normal?
Replace the valve body assembly (Refer to ).
Replace the valve body harness (Refer to ).
 
STEP 4. Symptom recheck after erasing diagnosis code
Is the diagnosis code set?
Replace the CVT-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).