DROP IN OIL PRESSURE (DTC CODE P0524 / DIAGNOSIS MONITOR CODE 4)

1. Check an engine oil level.

    

NO Check for oil leakage and add oil.	YES Proceed to [2] Measuring resistance between terminals

1. Turn the starter key to "LOCK" and disconnect the oil pressure warning switch connector.
2. Measure resistance between the GND and the terminal of the oil pressure warning switch connector (vehicle harness side).
   

   
   

   Standard value
   When an engine is not running: 0 Ω
   When an engine is running: ∞ Ω

NO Fault in oil pressure warning switch	YES Proceed to [3] Measuring resistance between terminals

1. Connect the signal check harness to the engine ECU.
2. Measure resistance between the terminal V43 and the chassis GND.
   

   
   

   Standard value: ∞ Ω

NO Faulty harness	YES Fault in engine ECU

1. Confirm the DTC P0524 is inactive

   • Start the engine and let it idling condition.
   • Verify the DTC P0524 is inactive.

   

2. DTC Clear

   • Clear the DTC with Hino DX
   • Confirm the same DTC is not reoccurred

   

P0524 is reoccur: Return to first process Other DTC appear: Refer to concerned Trouble shooting

Complete