| Symptom of malfunction | DPR regeneration is disabled. |
| Output limit, etc. | Without |
| Malfunction indicator light | Light out |
| Multi information | Engine system failure |
| Possible cause of malfunction | Malfunction of EGR actuator (severe malfunction) |
| Symptom of malfunction | DPR regeneration is disabled. |
| Output limit, etc. | Without |
| Malfunction indicator light | Light out |
| Multi information | Engine system failure |
| Possible cause of malfunction | Malfunction of EGR actuator (severe malfunction) |
Detail
- Check the EGR valve link.
Standard: No abnormality
NO
Faulty EGR valve
YES
Proceed to [2] Measuring voltage between terminals
- Set the starter key to the "LOCK" position and disconnect the EGR valve connector.
- Measure voltage between the 3rd and 4th terminals of the EGR valve connector (vehicle harness side).
NO
Fault in harness and/or battery
YES
Proceed to [3] Inspecting the EGR
- Use the HINO-DX to inspect the EGR.
Standard: The EGR must be operative without any failures (no deviation of an actual value from a reading).
NO
Faulty EGR valve
YES
Fault in harness or engine ECU
- Confirm the DTC P1458 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P1458 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P1458 is reoccur: Return to first process
- Other DTC appear: Refer to concerned Trouble shooting
Complete
