DEF SCR SYSTEM (DCU)
5–271
1.
Set the starter switch to the "LOCK" position.
2.
Replace with a new back flow valve of the DEF pump.
3.
Connect the SST2 again between the DEF tank (1) and the DEF
pump (2).
4.
Set the starter switch to the "ON" position.
5.
Perform the [Leak test] as same as step 2.
NO
YES
5
Inspect the DEF pressure 2 (Inspection of the DEF pump) [Hino-DX]
Back flow
connector
81 mm {3.19 in.}
φ
25 mm
{0.98 in.}
(2)
(1)
DEF
sensor
SST2
SAPH16F020400185
Measurement
conditions
Standard values
Starter switch: ON
The DEF pressure is stable in the 8,500
to 9,500 hPa (123.3 to 137.8 psi) range
for 60 seconds.
Do the measurements meet the standard value?
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.
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 ...
