DEF SCR SYSTEM (DCU)
5–255
DTC: P20E8
EN01H16F02040F03001051
DTC: P20E8 Suction line pressure build up check
INFORMATION
1. Technical description
•
DEF line pressure depends on ejection of the DEF pump.
•
DEF pump ejection is determined by value of DEF pressure sensor which is built in DEF pump.
<Description of malfunction>
•
Abnormal pressure in the DEF pipe is detected.
2. DTC set condition
(1) DTC detection condition
Exhaust gas temperature (SCR inlet) > 150
C {302
F}
DEF defrosting is done.
(2) Judgement criteria
After the DEF pump starts to build up pressure, DEF line pressure does not increase more than 8,000 hPa (116 psi)
for 50 sec., three times in a row.
Breather hose
Coolant outlet
Harness connector
Coolant inlet
Coolant inlet
DEF back flow (To DEF tank)
Coolant outlet
DEF pressure line (outlet)
DEF back flow
(To DEF tank)
DEF back flow
(To DEF tank)
DEF tank
DEF pump
DEF circuit
DEF Injector
Inside muffler
To DEF SCR
catalyst
DEF tank
DEF suction line
DEF sensor
(strainer)
DEF pump
DEF suction line
DEF suction line
DEF pressure line (outlet)
SAPH16F020400171
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 ...
