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3.9.2 MANUAL TEMPERATURE CONTROL CAUTION: Manual Temperature Control (MTC) Modules with software versions 0614 T to verify which version software the MTC Module is using by selecting Body Systems, HVAC, and then 3.9.2.1 SYSTEM AVAILABILITY EXCEPT EXPORT • Three different types of systems are currently c Single-Zone Air Conditioning System c Dual-Zone Air Conditioning System c Three-Zone Air Conditioning System EXPORT • Two different types of systems are currently c Single-Zone Air Conditioning System c Dual-Zone Air Conditioning System CABIN HEATER, EXPORT WITH DIESEL ENGINE • A Cabin Heater is used in conjunction with the 3.9.2.2 SYSTEM CONTROLS The A/C-Heater Control Module: • is fully addressable with the DRBIII t. • communicates over the Programmable Commu- • provides an A/C request to the Powertrain Con- • uses input from the evaporator temperature sen- • for exports with diesel engines, provides a Cabin Module (FCM) over the PCI Bus when conditions • provides a blower relay on request to the Front • controls front blower operating speed. The five • controls EBL operation. • on three-zone systems, activates and deactivates • on three-zone systems, controls rear blower oper- • controls the front and the three-zone system rear c A simplified control system for operation of On Three-Zone systems, the Rear A/C-Heater Con- • controls rear blower motor operating speed. The • provides desired rear blend and mode door posi- The Single-Zone HVAC system uses: • one, two-wire electronic blend door actuator. • one, two-wire electronic mode door actuator. • one, two-wire electronic recirculation door actua- The Dual-Zone HVAC system uses: • two, two-wire electronic blend door actuators. • one, two-wire electronic mode door actuator. • one, two-wire electronic recirculation door actua- The Three-Zone HVAC system uses: • two front, two-wire electronic blend door actua- • one front, two-wire electronic mode door actuator. 19 GENERAL INFORMATION |