[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > SYMPTOM PROCEDURES > ENGINE OIL PRESSURE SWITCH SYSTEM
Inspection Procedure 29: Engine Oil Pressure Switch System
 
 
 
 
OPERATION
  • Battery voltage is applied to the engine oil pressure switch from the engine-ECU connector terminal OPSW.
 
 
FUNCTION
  • Detect the oil pressure conditions and enter the result into the engine-ECU. After starting the engine if the oil pressure rises to higher than the given pressure, the engine oil pressure switch turns OFF. Under this condition the engine-ECU sends the command of turning off the oil warning lamp to the combination meter via CAN.
 
 
PROBABLE CAUSES
  • Failed engine oil pressure switch
  • Open/short circuit or harness damage in engine oil pressure switch circuit or loose connector contact
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Perform voltage measurement at engine oil pressure switch connector
  • Disconnect connector, and measure at the harness side.
  • Ignition switch: ON
  • Voltage between terminal engine-ECU OPSW line and body earth.
OK: System voltage
Is the check result normal?
Go to Step 4.
Go to Step 2.
 
STEP 2. Check of short to earth, and open circuit in OPSW line between engine oil pressure switch connector and engine-ECU connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 90: Engine oil pressure switch
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU.
 
STEP 4. Check of damage in OPSW line between engine oil pressure switch connector and engine-ECU connector.
Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.
 
STEP 5. Replace the engine oil pressure switch.
  • After the replacing the engine oil pressure switch, re-check the trouble symptoms.
Does the trouble symptom persist?
Replace the engine-ECU.
Check end.