Hino 238, Workshop Manual

Page: 369 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1146
1. Disconnect the exhaust gas temperature sensor (burner outlet)
connector.
2. Use the electrical tester to measure the resistance between the
terminals of the exhaust gas temperature sensor (burner outlet).
NO YES
1. Stop the engine.
2. Set the starter switch to the "ON" position.
3. Select [Check functions] - [EGR check] from the menu, then
inspect the response delay at the Target EGR position and Actual
EGR position.
! CAUTION
•
Perform the inspection while the engine is stopped to avoid
engine damages.
<Inspection procedure>
(1) Select [Check functions].
(2) Select [EGR check].
(3) Click [Check start].
(4) Click [EGR opening UP]:

Inspect the response delay at each step of the Target EGR posi-
tion and Actual EGR position from 0 to 100 %.
(5) Click [EGR opening DOWN]:

Inspect the response delay at each step of the Target EGR posi-
tion and Actual EGR position from 100 to 0 %.
HINT
• The EGR opening position changes of 10 % per step between
0
–
100 %.
14
Inspect the exhaust gas temperature sensor (burner outlet) unit
DIT+ DIT-
SAPH16F010300879
Measurement
conditions
Tester connections Standard values
Starter switch:
LOCK
Exhaust gas tem-
perature sensor
(burner outlet)
DIT+
–
DIT-
0.3
–
1.8

Do the measurements meet the standard value
？
Go to step 15. Replace the exhaust gas temperature sensor
(burner outlet).
Perform "After-inspection work" of INFOR-
MATION section.
15
Check the response of the EGR valve
(4)
(5)
(3)
(1)
(2)
SAPH16F010300880