Expand All| Criterion for determining | Disconnection for continuous 0.9 seconds or more, short-circuit for continuous 0.6 seconds or more |
| Inspection area and possible cause |
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Detail
- Set the starter key to the "LOCK" position and disconnect the 12- pin connector of the air suspension ECU and the open/close magnetic valve connector in the rear height control valve.
- Measure continuity between the 9th terminal of the 12-pin connector (vehicle harness side) and the 1st terminal of the open/close magnetic valve connector (vehicle harness side).
Standard: With continuity
NO
Abnormality in harnessYES
Proceed to [2] Inspecting harness for short-circuit
- Measure continuity between the 1st and 2nd terminals of the open/ close magnetic valve connector (vehicle harness side).
Standard: No continuity
NO
Abnormality in harnessYES
Proceed to [3] Inspecting the rear height control valve
- Inspect the rear height control valve.
Standard: No abnormality
NO
Abnormality in rear height control valveYES
Abnormality in air suspension ECU
- Confirm the DTC C3407 is inactive
- Start the engine and let it idling condition.
- Verify the DTC C3407 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- C3407 is reoccur: Return to first process
- Other DTC appear: Refer to concerned Trouble shooting
Complete
