Adblue“ Heater Coolant Solenoid Valve, Component Description - Mercedes-Benz OM 471 Introduction Into Service Manual

System components
GF14.40>W>3025H
ENGINE 471.9 in MODEL 963, 964
Location
Shown on engine 471.9 with code (M5Z)
Engine version Euro VI
Y627 AdBlue" heater coolant solenoid
valve
The AdBlue" heater coolant solenoid valve
(Y627) is located at the right rear on the
engine's crankcase.
Task
The AdBlue" heater coolant solenoid valve
(Y627) branches off coolant from the
engine's coolant circuit to heat the AdBlue"
line circuit, the AdBlue" container and the
pump module.
Design
1 Electrical connector
2 Coolant inlet
3 Coolant outlet
Y627 AdBlue" heater coolant solenoid valve
The AdBlue" heater coolant solenoid valve (Y627) is A 2/2 directional control valve.
Inside the valve, the valve body is designed as a solenoid armature.
Function
The AdBlue" heater coolant solenoid valve (Y627)) is actuated by
the engine management (MCM) control unit (A4). The AdBlue" fill
level sensor/temperature sensor (B74) enables the engine
management (MCM) control unit (A4) to recognize whether the
temperature of the AdBlue" is approaching the limit of 8 ∞C.
If the coolant has reached a temperature of f 65 ∞C, and the
temperature of the AdBlue has reached the limit value, then the
AdBlue" heater solenoid valve (Y627) is actuated by the engine
management (MCM) control unit (A4). The valve then opens and
coolant is branched off from the engine's coolant circuit.
If the AdBlue" heater coolant solenoid valve (Y627) is open, the
coolant is available at the closed valve body inside the
component.
180
AdBlue" heater coolant solenoid valve, component description
– This printout will not be recorded by the update service. Status: 09 / 2011 –
This valve body keeps the passage between the coolant supply
line and the coolant working line closed via the force of a push
spring.
When current is applied the valve body slides and opens the
passage so that coolant can flow through.
When the current is interrupted, the spring pushes it back into its
starting position. Thus means that the passage is blocked off
again.
20.7.11
W14.40>1600>76
W14.40>1573>71