Expand AllWhen neutral status is judged by the transmission control computer ASSY at the time of exhaust brake switch ON signal input, an exhaust brake cut request signal is sent as serial communication to the engine control computer. A diagnostic code is put out when an exhaust brake operating signal is received during transmission of this exhaust brake cut request signal transmission.
| DTC No. |
|
Inspection part |
| P1604/54 |
|
|
Detail
- Confirm output of P0863/88 (serial communication trouble) in addition to DTC P1604/54.
Standard:
Inspection result Step Only output of P1604/54 To step A Output of P1604/54 and P0863/88 To step B
When a diagnostic code other than DTC P1604/54 is put out, perform trouble-shooting first for that diagnostic code.
B
To the related diagnostic code chart (refer to page for the outline)A
Inspect and replace the transmission control computer ASSY.
- Confirm the DTC P1604/54 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P1604/54 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P1604/54 is reoccurF Return to first process
- Other DTC appearF Refer to concerned Trouble shooting
Complete
