DEF SCR SYSTEM (DCU)
5–305
1.
Check the installation of the engine coolant temperature sensor.
2.
Make sure there is no dirt or damage to the engine coolant tem-
perature sensor.
NO
YES
1.
Set the starter switch to the "ON" position.
2.
Select [Engine].
3.
Select [Engine coolant temperature] from [Data Monitor] on the
menu.
4.
When the engine coolant temperature (actual measured value) is
50
C {122
F}, check if the temperature output by the engine cool-
ant temperature sensor is 50
C {122
F}.
NO
YES
3
Inspect the engine coolant temperature sensor
Was any failure found?
Clean the engine coolant temperature sensor
and install it properly. If damaged, replace
the engine coolant temperature sensor.
Perform "After-inspection work" of INFOR-
MATION section.
Go to step 4.
4
Check the engine coolant temperature sensor output signal [Hino-DX]
Select
Engine
SAPH16F020400208
Standard values
Coolant temperature sensor output value: 50
C {122
F}
Do the measurements meet the standard value?
Go to step 5.
Replace the engine coolant temperature sen-
sor.
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 ...
