DEF SCR SYSTEM (DCU)
5–168
1.
Disconnect an engine coolant temperature sensor connector.
2.
Use the electrical tester to measure the resistance between the
terminals of the engine coolant temperature sensor.
NO
YES
1.
Connect the vehicle to Hino-DX.
2.
Set the starter switch to the "ON" position.
3.
Select [DCU] and check if P205B has been detected in [Fault Infor-
mation].
NO
YES
14
Inspect the engine coolant temperature sensor unit
WTM+
WTM-
SAPH16F020400111
Measurement
conditions
Tester
connections
Standard values
Starter switch:
LOCK
Engine coolant
temperature
sensor
WTM+
–
WTM-
20
C {68
F}:
2.59
–
2.32 k
80
C {176
F}:
0.326
–
0.310 k
Do the measurements meet the standard value?
Go to step 15.
Replace the engine coolant temperature sen-
sor.
Perform "After-inspection work" of INFOR-
MATION section.
15
Check the DTC detected (DCU)
Select
DCU
SAPH16F020400112
Has DTC P205B been detected?
Replace the DCU.
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 ...
