ENGINE CONTROL SYSTEM (J08E)
4–1208
INSPECTION PROCEDURE: P2459
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 any DTC other than P2459 has been
detected in [Fault Information].
NO
YES
1.
Erase the trouble history.
2.
Set the starter switch to the "LOCK" position.
3.
Make sure the engine ECU main relay is OFF in Hino-DX menu.
(This cuts off the communication between Hino-DX and the engine
ECU.)
4.
Set the starter switch to the "ON" position.
5.
Select [Engine] and check if DTC has been detected in [Fault Infor-
mation].
NO
YES
1
Check the DTC detected (Engine ECU) [Hino-DX]
Select
Engine
SAPH16F010300946
Has a DTC other than P2459 been detected?
Go to diagnosis procedure of a related DTC.
Go to step 2.
2
Check the DTC detected (Engine ECU) [Hino-DX]
Select
Engine
When communicat-
ion with the engine
ECU is interrupted
while the engine
ECU is connected
to the Hino-DX,
the connection
symbol at the left
bottom of the Hino-
DX screen (figure
on the left) becom-
es disconnected.
SAPH16F010300947
Has DTC P2459 been detected?
Replace the engine ECU.
Perform "After-inspection work" of INFOR-
MATION section.
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 ...
