P0521: Malfunction Of Oil Pressure Switch (High); Dtc: P0521 - Hino Motors HINO 155 series Workshop Manual

DTC: P0521

P0521: Malfunction of oil pressure switch (High)

INFORMATION
Body earth
1. Technical description
• A rise in engine oil pressure is sensed by the oil pressure switch.
<Description of malfunction>
• Abnormality (high-pressure) in engine oil pressure is detected.
2. DTC set condition
(1) DTC detection condition
• The engine stopped.
• Engine coolant temperature of 30 C {86 F} or more.
(2) Judgement criteria
• The oil pressure switch continues to be OFF (high-pressure detection) for more than 3 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
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• –
<Symptoms on the vehicle due to malfunction>
• –
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
• Insufficient oil pan oil quantity.
• Malfunction of oil pressure switch.
• +B short-circuit of disconnection harness.
• Engine oil viscosity is high.
ENGINE (J05E)/TROUBLESHOOTING
Oil pressure switch
H26
(S)
Engine ECU
6.1mA GCP
(OSW)
12.3mA
XZP
(DM)
2–583
EN01H02127030602016091
SHTS021270300534