DEF SCR SYSTEM (DCU)
5–209
INSPECTION PROCEDURE: P20A1
1.
Set the starter switch to the "LOCK" position.
2.
Connect the vehicle to Hino-DX.
3.
Set the starter switch to the "ON" position.
4.
Select [DCU] from the menu.
5.
Select [Reverting valve] from [Activation Test] and check the oper-
ating sound of the reverting valve.
NO
YES
1.
Select [DEF pump position] from the [Activation Test] menu and
operate the DEF pump.
2.
Select [DEF pump pressure] from the [Data Monitor] menu and
check the DEF pressure.
NO
YES
1
Check the operation of the DEF pump (reverting valve) [Hino-DX]
Select
DCU
SAPH16F020400136
Did you hear the operating sound?
Go to step 2.
Replace DEF pump.
Perform "After-inspection work" of INFOR-
MATION section.
2
Inspect the DEF pump (reverting valve) [Hino-DX]
Select
DCU
SAPH16F020400137
Standard values
DEF pressure: less than 50 kPa {7.3 psi}
Do the measurements meet the standard value?
Go to step 3.
Replace the DEF pump.
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 ...
