P0524: Engine Oil Pressure Too Low; Dtc: P0524 - Hino Motors HINO 155 series Workshop Manual

DTC: P0524

P0524: Engine oil pressure Too Low

INFORMATION
Body earth
1. Technical description
• A drop in engine oil pressure is sensed by the oil pressure switch.
<Description of malfunction>
• Drop in engine oil pressure is detected.
2. DTC set condition
(1) DTC detection condition
• While the engine is in operation - Always
(2) Judgement criteria
• The oil pressure switch continues to be ON for more than 30 seconds.
3. Reset condition
• Immediately after normal operation is restored.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: OFF
• SVS light: ON
• Cruise control is not available.
• After fixed time, engine stopped.
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• Cruise control does not work.
• After fixed time, engine stopped.
<Symptoms on the vehicle due to malfunction>
• Drop in engine oil pressure
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
7. After-inspection work
• Clear all past DTCs.
• Check that no DTC is stored after test drive.
8. Estimated failure factors
• Drop in oil pan oil quantity: Drop in pressure due to air suction
• Malfunction of oil pressure circuit: Drop in pressure due to oil leakage
• Malfunction of oil pressure switch: Correct oil pressure cannot be sensed.
• GND short-circuit of harness: The sensing result of the oil pressure switch becomes invalid.
ENGINE (J05E)/TROUBLESHOOTING
Oil pressure switch
H26
(S)
Engine ECU
6.1mA GCP
(OSW)
12.3mA
XZP
(DM)
2–587
EN01H02127030602016092
SHTS021270300538