ENGINE CONTROL SYSTEM (J08E)
4–1109
1.
Check the EGR valve for damage due to foreign substances.
2.
Check if there is soot obstructing the exhaust gas passageway
inlet or outlet.
NO
YES
Check the injection quantity and the rotational fluctuation.
1.
Start the [Engine].
2.
Select [Injection quantity] from [Data Monitor] on Hino-DX menu,
and measure the fuel injection rate.
3.
Select [Engine speed] from [Data Monitor] on Hino-DX menu, and
measure the engine speed fluctuation.
10
Inspect the EGR valve
Was any failure found?
Remove foreign substances and clean the
EGR valve.
Replace the EGR valve if it is damaged.
Perform "After-inspection work" of INFOR-
MATION section.
Go to step 11.
11
Check the injector [Hino-DX]
E
n
gi
n
e
Ne
(r/min)
NE Rotational fluctuation
@1,500 r/min (measurement by Hino-DX)
Select
Engine
SAPH16F010300850
Measurement conditions
Engine speed: 1,500 r/min No-load,
T/M shift lever: Neutral position, A/C off and
Air compressor un-operating.
Engine coolant temperature: more than 80
C {176
F}
Standard values
Type of
MT
Allison 2200
Allison 2500
Allison 3500
Q (mm
3
/st)
5.0q
6.0q
Ne (r/min)
26
Do the measurements meet the standard value?
(Both the injection quantity and the rotational fluctuation are within the standard values)
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 ...
