Hino 238, Workshop Manual

Page: 303 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1080
INSPECTION PROCEDURE: P2228 and P2229
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 (P2228 or P2229)
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) 1
Select
Engine
SAPH16F010300831
Has a DTC other than (P2228 or P2229) been detected?
Go to the diagnostic procedure of a related
DTC. Go to step 2.
2
Check the DTC detected (Engine ECU) 2
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.
SAPH16F010300832
Has DTC (P2228 or P2229) been detected?
Replace the engine ECU.
Perform "After-inspection work" of INFOR-
MATION section. Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.