Coolant Circuit Schematic - Mercedes-Benz OM 471 Introduction Into Service Manual

Functions
GF20.00>W>0001>01H

Coolant circuit schematic

1 Oil/coolant module
1.1 Coolant thermostat
1.2 Coolant pump
1.3 Oil/water heat exchanger
2 Cylinder liners
3.1 Lower coolant level
3.2 Upper coolant level
4 Coolant manifold
5 Nozzle unit for regeneration of
diesel particulate filter (only
with code (M5Z) Euro VI engine
version)
A901 Heater for auxiliary water
heater (only with code (D6M)
Cab auxiliary water heater or
code (D6N) Cab and engine
auxiliary water heater)
A901 M2 Circulation pump (only with
code (D6M) Cab auxiliary water
heater or code (D6N) Cab and
engine auxiliary water heater)
B47 Coolant level switch
86
6 Exhaust gas recirculation
cooler
7 Throttle
8 Fuel cooler
9 Compressor
10 Coolant expansion reservoir
11 Radiator
12 Fan
13 Heating system heat exchanger
14 Coolant feed to AdBlue"
heater
15 Coolant return from AdBlue"
heater
B87 Sensor for coolant pressure
regulation (only with code
(B3H) Secondary water
retarder)
B606 Exhaust coolant temperature
sensor
B607 Intake coolant temperature
sensor
B640 Coolant pump rpm sensor (only
with code (M7T) Coolant
pump, controlled)
M20 Residual heat pump (only with
code (D6I) Residual>heat
utilization)
Y49 Heater shutoff valve
– This printout will not be recorded by the update service. Status: 09 / 2011 –
W20.00>1068>79
16 Coolant feed to retarder (only
with code (B3H) Secondary>
water retarder)
17 Coolant return from retarder
(only with code (B3H)
Secondary>water retarder)
18 Coolant return to retarder
ventilation (only with code
(B3H) Secondary>water
retarder)
Y53 Solenoid valve for coolant
pressure regulation (only with
code (B3H) Secondary water
retarder)
Y621 Exhaust gas recirculation
positioner
Y627 AdBlue" heater coolant
solenoid valve
Y631 Solenoid valve for coolant
pump (only with code (M7T)
Coolant pump, controlled)
B Cylinder head
C Crankcase
NV Compressed air supply
electrical accessory