October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Manual Temperature Control (MTC)

The Manual Temperature Control (MTC):

controls blower motor operation, providing four blower speeds (Low, M1, M2, & High).
interfaces with the BCM through hardwired circuits.
provides temperature setting information to the BCM through a resistor.
provides an A/C request, an EBL request, and mode switch setting information to the BCM through a resistive multiplexed circuit.

The Body Control Module (BCM):

drives the EBL status indicator in the MTC. Refer to the appropriate service information for additional information about rear window defogger operation.
drives the electric door actuators (mode, blend, recirc).
sends and A/C request, over the PCI Bus, to the PCM when A/C operation is desired.
uses Evaporator Temperature Sensor data to prevent evaporator freeze up while maintaining optimum cooling performance.

The MTC HVAC system uses:

one, five-wire electric blend door actuator.
one, five-wire electric mode door actuator.
one, two-wire electric recirculation door actuator.