DEF SCR SYSTEM (DCU)
5–289
1.
Start the engine.
2.
Select [Engine] on the Hino-DX.
3.
Select [Actual boost pressure] from [Data Monitor] on the menu.
4.
Race the engine from idle to No-Load Maximum and check if the
boost pressure output signal varies.
NO
YES
1.
Check the installation of the intake manifold temperature sensor.
2.
Make sure there is no dirt or damage to the intake manifold tem-
perature sensor.
NO
YES
7
Check the boost pressure sensor output signal [Hino-DX]
Select
Engine
SAPH16F020400198
Standard values
Boost pressure sensor output value: There is no abnormal
change in the sensor output signal. (The pressure sensor
signal changes according to the engine speed)
Do the measurements meet the standard value?
Go to step 8.
Replace the boost pressure sensor.
Perform "After-inspection work" of INFOR-
MATION section.
8
Inspect the intake manifold temperature sensor
Was any failure found?
Clean the intake manifold temperature sen-
sor and install it properly. If damaged,
replace the intake manifold temperature sen-
sor.
Perform "After-inspection work" of INFOR-
MATION section.
Go to step 9.
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 ...
