A/C Disconnection

When the Automatic Climate Control (ACC) compressor is to be activated, the Electronic Display Unit (EDU) control module is supplied with voltage from the ACC/A/C switch. The control module registers the engine temperature and at engine temperatures lower than those specified for A/C disconnection, the EDU control module feeds the voltage on via a pressure switch and an anti-freeze thermostat which is connected to the Trionic/Motronic control module. The engine management system grounds the A/C relay when the condition for A/C connection has been met.