Coolant Recirculation Pump -V50- FUNCTION
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Function Mode
- The bracket -4- for the Coolant Recirculation Pump -V50- -1- and for the Coolant Shut-Off Valve -N82- -2- is connected with the body via the clip nuts -6- to reduce noise.
- The Coolant Shut-Off Valve -N82- and the Coolant Recirculation Pump -V50- are directly connected to the bracket
- The Coolant Recirculation Pump -V50- supports the engines own coolant pump during coolant recirculation. It is activated by the Climatronic Control Module -J255- control head to ensure sufficient and even coolant flow through the A/C heater core.
NOTE:
The installation of the Coolant Shut-Off Valve -N82- and the Coolant Recirculation Pump -V50- depends upon the engine and the vehicle equipment.
There is no Coolant Recirculation Pump -V50- / Coolant Shut-Off Valve -N82- installed for vehicles with an auxiliary heater. These functions are carried out by the Recirculation Pump -V55- / Heater Coolant Shut-Off Valve -N279-.
- The coolant is drawn in via the coolant hose -5- from the engine with the Coolant Recirculation Pump -V50- -6- running and is pumped via the coolant hose -3- to the heater core for the heater (for the A/C unit).
- Using the coolant hose -4-, the coolant flows back to the engine via the return hose -1- for the heater core and the Coolant Shut-Off Valve -N82- -2- (depending on the engine version and the vehicle equipment).
- Depending on the coolant temperature and the setting on the Climatronic Control Module -J255- control head, the Coolant Recirculation Pump -V50- is directly activated by it when the ignition is switched on.
- The Coolant Recirculation Pump -V50- (and the Coolant Shut-Off Valve -N82-) is also directly activated by the Climatronic Control Module -J255- control head for vehicles with a "Start/Stop System".
- There may be faults in these components stored in the Climatronic Control Module -J255- control head. Therefore pay attention to the version, coding, and adaptation of the Climatronic control module -J255-. use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.