ENGINE CONTROL SYSTEM (J08E)
4–945
INSPECTION PROCEDURE: P20EE
1.
Check the DEF solution concentration.
NO
YES
1.
Perform a basic engine check using the ENGINE BASIC INSPEC-
TION SHEET (ENGINE INSPECTION CHECK SHEET).
NO
YES
1.
Check the installation of the air flow sensor.
2.
Make sure there is no dirt or damage to the air flow sensor.
1
Check the DEF solution
Standard values
32.5
2.5 %
Do the measurements meet the standard value?
Go to step 2.
Replace the DEF solution.
If the DEF concentration is below the stan-
dard, drain the DEF solution through the tank
drain with the starter switch ON, and then
refill the tank with at least 5 liters {1.3 gal-
lons} of DEF. Afterward, drive the vehicle and
confirm that the problem does not recur
under driving conditions.
Perform "After-inspection work" of INFOR-
MATION section.
2
Perform a basic engine check [Hino-DX]
Was any failure found?
Repair or replace the faulty part.
Perform "After-inspection work" of INFOR-
MATION section.
Go to step 3.
3
Inspect the air flow sensor
Was any failure found?
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 ...
