Charge air cooling circulation pump function - GF09.41-P-3102-02H
The charge air cooler circulation pump (M44) is switched on or off via the charge air cooler circulation pump relay.
The charge air cooler circulation pump relay is located in the:
Model 170 Cycling module (traction systems, RS, ATA, AAC)
Model 203 Rear SAM control unit with fuse and relay module
The charge air cooler circulation pump relay is actuated through a ground signal by the ME control unit 2.8.1.
The charge air cooler circulation pump operates irrespective of the charge air temperature (permanent).