ECU INTERNAL MALFUNCTION [HARDWARE DETECTION]
(DTC CODE P0606 / DIAGNOSIS MONITOR CODE 3)

If the Malfunction indicator light lights up:

Symptom of malfunction	Cruise functions are disabled. Idle stop functions are disabled. PTO functions are disabled.
Output limit, etc.	Without
Malfunction indicator light	Light on
Multi information	Engine system failure (red) ↔ Stop the vehicle in the safe area.
Possible cause of malfunction	ECU internal malfunction (hardware detection)

If the Malfunction indicator light lights out:

Expand All

Symptom of malfunction	-
Output limit, etc.	Without
Malfunction indicator light	Light out
Multi information	Post-driving engine inspection
Possible cause of malfunction	ECU internal malfunction (hardware detection)

1. Checking of diagnosis code

Detail

After setting the starter key to the "LOCK" position, turn it "ON" again.
Use the HINO-DX to delete past malfunctions. Check if the same code (DTC code P0606, P0607 / diagnosis monitor code 3) is output again.

Standard: Normal

NO

Fault in engine ECU
YES

No problem if the condition returns to the proper state. Electromagnetic interface may have caused short-lived malfunction.

DTC Clear

Detail

Confirm the DTC P0606 is inactive

Start the engine and let it idling condition.
Verify the DTC P0606 is inactive.

DTC Clear

Clear the DTC with Hino DX
Confirm the same DTC is not reoccurred

P0606 is reoccur: Return to first process
Other DTC appear: Refer to concerned Trouble shooting

Complete

ECU INTERNAL MALFUNCTION [HARDWARE DETECTION] (DTC CODE P0606 / DIAGNOSIS MONITOR CODE 3)

1. Checking of diagnosis code

DTC Clear

ECU INTERNAL MALFUNCTION [HARDWARE DETECTION]
(DTC CODE P0606 / DIAGNOSIS MONITOR CODE 3)