DEF SCR SYSTEM (DCU)
5–156
1.
Disconnect the DCU 86P connector.
2.
Connect the signal check harness and use the electrical tester to
measure the resistance between the terminals of the DCU 86P
vehicle-side connector and the ground.
NO
YES
1.
Connect the DEF pump connector.
2.
Connect the signal check harness and use the electrical tester to
measure the resistance between the terminals of the DCU 86P
vehicle-side connector.
3
Check for short-circuit in wire harness of DEF pump (pressure sensor)
PSR-
PSRS
PSR+
SAPH16F020400102
Measurement
conditions
Tester
connections
Standard values
Starter switch:
LOCK
DCU 86P vehicle-
side connector
PSR+
–
Ground
PSRS
–
Ground
PSR-
–
Ground
Do the measurements meet the standard value?
Go to step 4.
Repair or replace the harness.
Perform "After-inspection work" of INFOR-
MATION section.
4
Check for disconnection in wire harness of DEF pump (pressure sensor)
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 ...