COOLANT PUMP - ENGINE CODE(S): CALA & CCBA Audi A4 B8

COOLANT PUMP - ENGINE CODE(S): CALA & CCBA

Note. Depending on the version of the Climatronic Control Module -J255-, Coolant Pump -V50- may be referred to as Water Pump -V36- in Guided Fault Finding. Refer to Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

Scheme 78

1. 6 cylinder vehicles with FSI (currently not on 6 cylinder TFSI vehicles) and on other engines with certain options (for example, vehicles with Start/Stop) but without an auxiliary heater have a coolant pump (water pump). Refer to «[For transmission(s) 0AW] [For engine(s) CALA] Description and Operation»(ref-511938-S23935533022012102900000) or to «[For engine(s) CCBA] Description and Operation»(ref-511939-S04704174632012102900000) . The coolant pump (water pump) activation depends on the vehicle equipment level and the vehicle date of manufacture. Refer to Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" refer to appropriate SYSTEM WIRING DIAGRAM.
2. On vehicles with a 6 cylinder FSI engine but without an auxiliary heater, the coolant pump (water pump) -A- is installed between the engine and the right longitudinal member under the right headlamp. The illustration shows the location on an Audi A5 Coupe with a 6 cylinder FSI engine, on an Audi A5 Sportback, an Audi A4, etc. The location of the components may be different on vehicles with a different engine. Refer to «[For transmission(s) 0AW] [For engine(s) CALA] Removal and Installation»(ref-511938-S13544006372012102900000) or to «[For engine(s) CCBA] Removal and Installation»(ref-511939-S22713834192012102900000) .
3. When the coolant pump (water pump) is running, the coolant flows from the engine through the coolant hose -B- and through the coolant hose -C- to the heat exchanger inside the air conditioner (note the flow direction -arrows-).
4. As of MY 09, the coolant pump (water pump) is controlled directly by the Climatronic control module depending on the date of manufacture and via the Recirculation Pump Relay -J160- (by the same output like the Climatronic Refrigerant Shut-Off Valve -N422-) Testing and Information System VAS 5051 in "Guided Fault Finding", refer to appropriate SYSTEM WIRING DIAGRAM.
5. On vehicles with a recirculation pump relay (for example, MY 08 vehicles) the coolant pump (water pump) is always activated when the ignition is turned on, when the Climatronic refrigerant shut-off valve is not on (for example, when the temperature is set to warm on the Climatronic control module). refer to appropriate SYSTEM WIRING DIAGRAM.
6. On vehicles without a recirculation pump relay (running change in MY 09), the coolant pump (water pump) is controlled by the setting on the Climatronic control module, depending on the coolant temperature with the ignition turned on. Refer to Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding, refer to appropriate SYSTEM WIRING DIAGRAM.
7. On vehicles where the coolant pump (water pump) and the Climatronic refrigerant shut-off valve are controlled directly by the Climatronic control module; any malfunctions on these components are stored in the Climatronic control module. Pay attention to the version, the coding and the adaptation on the Climatronic control module using Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding".
8. If the vehicle has an auxiliary heater, then it will not have a Climatronic refrigerant shut-off valve or a coolant pump (water pump). The auxiliary heater components do this function (the Heater Coolant Shut-Off Valve -N279- and the Recirculation Pump -V55-).