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AUTOMATIC TEMPERATURE CONTROL (ATC) INDEX page page Ambient Temperature Sensor . . . . . . . . . . . . . . . 67 ATC Computer/Control Panel . . . . . . . . . . . . . . . . 66 Blend-Air Door Actuator . . . . . . . . . . . . . . . . . . . . 69 Computer Aided Diagnostic Tests . . . . . . . . . . . . 72 Diagnostic Trouble Code Definitions . . . . . . . . . . 73 Diagnostic Trouble Code Service Procedures . . . 74 Erasing Diagnostic Trouble Codes . . . . . . . . . . . . 83 Fresh/Recirc Door Actuator . . . . . . . . . . . . . . . . . 68 General Information—Component Operation . . . . 66 In-Car Temperature Sensor/Aspirator Assembly . . 70 Manual A/C Mode . . . . . . . . . . . . . . . . . . . . . . . . 66 Mode Door Actuator . . . . . . . . . . . . . . . . . . . . . . 69 Non—Computer Aided Diagnostic Tests . . . . . . . 72 Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Sun Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Water Temperature Sensor . . . . . . . . . . . . . . . . . 71 GENERAL INFORMATION—COMPONENT The Automatic Temperature Control (ATC) system lets the operator change the passenger compartment The system goes into a maximum cool recirculated air lock-in mode: • When the temperature button is held in for ten This will not regulate the temperature until the system is turned off or the comfort setting is raised Vacuum is not used to control any of the ATC sys- tem or components. It is a totally electronic unit. The A/C compressor can not be turned off in the AUTO mode. MANUAL A/C MODE The manual mode can be activated by pressing the mode button. The compressor can only be turned The display panel will show LO, 1-10, and HI sym- bols when in the manual mode. ATC COMPUTER/CONTROL PANEL The ATC computer controller (Fig. 3) manages all of the systems electronic functions. It provides logic Fig. 1 Automatic Temperature Control Computer Panel Fig. 2 Automatic Temperature Control Panel Display Symbols 24 - 66 HEATING AND AIR CONDITIONING Ä |