Coolant Temperature Signal.

This signal is supplied to the A/CCM from the instrument cluster, the input being required to:

• Provide blower inhibit control , to avoid the system in heating mode delivering cold air when the coolant temperature is below 35C unless DEFROST is selected.
• To progressively increase the fan speed up to maximum blower speed during warm up control.
• To assist in the control of the outlet temperature.
• To avoid possible pump or valve damage caused by ice particles in the coolant.