Hino 338 - Check for Short-Circuit in the Coolant Cut off Valve (DEF Tank Heater Valve) Wire Harness; Check for Disconnection in the Coolant Cut off Valve (DEF Tank Heater Valve) Wire Harness

DEF SCR SYSTEM (DCU) 5–227
1. Disconnect the DCU 86P connector.
2. Connect the signal check harness and use the electrical tester to
measure the resistance between the ground and each terminal of
the DCU 86P vehicle-side connector.
NOYES
1. Connect the coolant cut off valve (DEF tank heater valve) connec-
tor.
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 the coolant cut off valve (DEF tank heater valve) wire harness
WMV-
WMV+
SAPH16F020400151
Measurement
conditions
Tester
connections
Standard values
Starter switch:
LOCK
DCU 86P vehicle-
side connector
WMV+ – Ground
WMV- – 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 the coolant cut off valve (DEF tank heater valve) wire harness
WMV-
WMV+
SAPH16F020400152