3309936 - E6021 COMPRESSOR ENGAGEMENT - Description (Automatic transmission)

Description

When required, the climate control system ECU automatically activates the cooling circuit and dehumidifies the air by operating the air conditioner compressor. For further details see  Characteristic of working principle 5040  AIR CONDITIONING CASING AND COMPONENTS . The compressor may also be deactivated by the 4-stage pressure switch or the engine management unit according to the engine management software, which is different for each engine version  Characteristic of working principle 1056  PETROL INJECTION SYSTEM . The compressor supply circuit is controlled by a specific relay, located in the engine bay close to the battery.The relay contact line is protected by a special fuse located in the junction unit.