PAGE 2.1 - 20 OPERATION MARK IV HD J2 TAMPER
REVISED 10 - 2020 CONTROLS BULLETIN 5082505
2.1
2.1.2 Controls - Exterior
(32) Engine Electronic Control Module (ECM) - See Figure 2.1-18
(33) Engine Diagnostic Connector - See Figure 2.1-18
(34) Engine Diesel Exhaust Fluid (DEF) Doser Module - See Figure 2.1-18
The Engine Electronic Control Module (ECM), Diagnostic Connector and Diesel Exhaust Fluid
(DEF) Doser Module are located inside of the engine enclosure on the right side of the engine.
The ECM is located behind of the DEF Doser Module.
a. The ECM can detect abnormal engine operating conditions or faults in several engine
systems. Faults are stored in the ECM for later use by service personnel.
b. The Diagnostic Connector can be used to connect an external Cummins Diagnostic
Monitor for troubleshooting procedures.
c. The DEF Doser Module controls the Diesel Exhaust Fluid.
(35) Engine Coolant Valves - See Figure 2.1-19
The Engine Coolant Valves are located inside of the engine enclosure on the left side of the
engine.
a. During cold weather when the Heater is being used, both the supply and return
Coolant Supply Valves must be fully opened (valve handle parallel to valve body) to
allow the flow of warm coolant to the Heater.
b. During warm weather when the Air Conditioner is being used, both the supply and
return Coolant Supply Valves should be fully closed (valve handle perpendicular to
valve body) to provide maximum cooling of the Air Conditioner.
(36) Engine Coolant Booster Pump - See Figure 2.1-19
The Engine Coolant Booster Pump is located inside of the engine enclosure on the left side of
the engine mounting frame. The pump will automatically turn On when the Heater Switch of the
AC / Heater Unit in the cab is turned On to pump warm coolant to the heater unit. The pump will
automatically turn Off when the Heater Switch of the AC / Heater Unit in the cab is turned Off.
To Next Page
Loading...