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All| ABS light indication | 2-4 |
| Malfunction code | 2-4 (1) |
| Description of malfunction | 24 V short-circuit in ABS valve (left, rearward) |
| Vehicle status | Not actuated ABS control |
| Possible cause | Short-circuit in harness between ECU and ABS valve |
| ECU terminals subject to inspect | The 11th and 12th terminals of 18 pin connector |
Detail
- Turn the starter key "ON".
- Measure voltage between the 12th terminal of the ABS ECU 18 pin connector and the 13th terminal of the 15 pin connector.
(Keep the connectors as assembled to the ECU.)
Standard value: 1 V or less
This diagram shows the connectors as viewed from the connecting face.
NO
24 V short-circuit in harness between ABS ECU and ABS valve (left, rearward)
Inspect the harness.YES
Proceed to [2] Measuring voltage between terminals
- Measure voltage between the 11th terminal of the 18 pin connector and the 13th terminal of the 15 pin connector.
(Keep the connectors as assembled to the ECU.)
Standard value: 1 V or less
This diagram shows the connectors as viewed from the connecting face.
NO
24 V short-circuit in harness between ABS ECU and ABS valve (left, rearward)
Inspect the harness.YES
Normal now. Short-lived 24 V short-circuit is likely to have occurred.
Inspect the harness inspected in steps [1] and [2].
- Confirm the DTC P0903 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P0903 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P0903 is reoccur: Return to first process
- Other DTC appear: Refer to concerned Trouble shooting
Complete
