If no multi-information is displayed:
| Symptom of malfunction | - |
| Output limit, etc. | Without |
| Malfunction indicator light | Light out |
| Multi information | Without |
| Possible cause of malfunction | Malfunction of supply pump solenoid valve |
If multi-information is displayed:
| Symptom of malfunction |
|
| Output limit, etc. | Output limit |
| Malfunction indicator light | Light out |
| Multi information | Engine system failure |
| Possible cause of malfunction | Malfunction of supply pump solenoid valve |
Detail
- Set the starter key to the "LOCK" position and connect the signal check harness.
- Disconnect the signal check harness connectors from the ECU and measure resistance between the terminals E7 and E27.
Standard value: 2-3.4 Ω
Standard value: ∞ Ω
NO
Go to [2] Inspecting the supply pump solenoid valve relay.YES
Go to [3] Checking the diagnosis code.
- Disconnect the supply pump solenoid valve connector.
- Measure resistance between the 1st and 2nd terminals of the supply pump solenoid valve connector (component side).
Standard value: 2-3.4 Ω
Standard value: ∞ Ω
NO
Fault in supply pump solenoid valveYES
Fault in harness and/or connector
- Connect the signal check harness connectors to the ECU and start the engine.
- Use the HINO-DX to delete past malfunctions and then check a present malfunction.
- Replace the engine ECU if the same code is output again. If a normal code is output, there may have been some short-lived abnormalities.
- Confirm the DTC P0628 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P0628 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P0628 is reoccur: Return to first process
- Other DTC appear: Refer to concerned Trouble shooting
Complete
