ENGINE CONTROL SYSTEM (J08E)
4–1311
INSPECTION PROCEDURE: U0073
1.
Set the starter switch to the "LOCK" position.
2.
Connect the vehicle to Hino-DX.
3.
Set the starter switch to the "ON" position.
4.
Select [Engine] and check if U0073 has been detected in [Fault
Information].
NO
YES
1
Check the DTC detected (Engine ECU)
Select
Engine
SAPH16F010301030
Has DTC U0073 been detected?
Replace the engine ECU.
NOTICE
If multiple CAN communication-related DTCs
(U ***) are detected, it is considered failure of
the main CAN communication line. Refer to
"ENGINE CAN COMMINICATION LINE / CAN
COMMUNICATION LINE MALFANCTION
PART DETERMINATION TABLE" of "CAN
chapter" and inspect the diagnosed item of
the detected DTC.
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.
Summary of Contents for 238
Page 201: ...ENGINE CONTROL SYSTEM J08E 4 978 Harness disconnection or short circuit ...
Page 215: ...ENGINE CONTROL SYSTEM J08E 4 992 Malfunction of sensor 2 Malfunction of engine ECU ...
Page 301: ...ENGINE CONTROL SYSTEM J08E 4 1078 8 Estimated failure factors Malfunction of engine ECU ...
Page 709: ...DEF SCR SYSTEM DCU 5 143 8 Estimated failure factors DEF pump pressure sensor malfunction ...
