ENGINE CONTROL SYSTEM (J08E)
4–854
1.
Select [Check functions] and then [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
damages.
<Inspection procedure>
(1) Select [Check functions].
(2) Select [EGR check].
(3) Click [Check start].
(4) Select [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) Select [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 around 10 % per step
between 0
–
100 %.
NO
YES
5
Inspect the response delay of the EGR valve [Hino-DX]
(4)
(5)
(3)
(1)
(2)
SAPH16F010300678
Standard values
From the Target EGR position to the Actual EGR position, the
response delay should be within 5 seconds.
Do the measurements meet the standard value?
Replace the engine ECU.
Perform "After-inspection work" of INFOR-
MATION section.
Replace the EGR valve.
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 ...
