STOP AND START SYSTEM > Engine Oil Pressure Switch Circuit


DESCRIPTION

The engine stop and start ECU prevents the engine oil pressure warning light from illuminating while the engine is stopped due to Stop and Start system control (OIL terminal).
(When the Stop and Start system control is not activated, the engine oil pressure warning light turns on while the engine is stopped.)

WIRING DIAGRAM


A217712E01


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (OIL PRESSURE SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Stop and Start / Data List / Oil Pressure Switch.

  1. Start the engine using the ignition switch, and then read the Oil Pressure Switch value when the engine is idling and when the engine is stopped.

    OK:
    ON is displayed when the engine is stopped.
    OFF is displayed when the engine is idling.

    HINT:
    While the engine is stopped due to Stop and Start system control, the oil pressure warning light is off.



NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

2.INSPECT LUBRICATION SYSTEM

  1. Inspect the engine oil level (Click here).

  1. Inspect the engine oil pressure (Click here).



NG
CHECK AND REPLACE LUBRICATION SYSTEM
OK


3.INSPECT ENGINE OIL PRESSURE SWITCH ASSEMBLY

  1. Inspect the engine oil pressure switch assembly (Click here).



NG
REPLACE ENGINE OIL PRESSURE SWITCH ASSEMBLY (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ENGINE OIL PRESSURE SWITCH)

  1. Disconnect the engine oil pressure switch connector and the engine stop and start ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D79-22 (MOPS) - B31-1
    		Always
    		Below 1 Ω
    D79-22 (MOPS) or B31-1 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the engine oil pressure switch connector and the engine stop and start ECU connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - COMBINATION METER ASSEMBLY)

  1. Disconnect the engine stop and start ECU connector and the combination meter assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D78-26 (OIL) - D2-13 (S)
    		Always
    		Below 1 Ω
    D78-26 (OIL) or D2-13 (S) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the engine stop and start ECU connector and the combination meter assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)