HEATER - FUNCTIONAL DESCRIPTION

1.8 T.SPARK, 2.0 JTS, 1.9 JTD 16V

Operational description

The climate control system control unit M70

receives an ignition-controlled power supply (INT/A) at pin 3 from the line protected by fuse F31 of the junction unit under the dashboard B2

.''; receives a direct supply at pin 2 from the line protected by fuse F39 of the junction unit under the dashboard B2

Pin 1 of M70

is earthed.

The recirculation actuator N82

is operated by control unit M70

from pins 14, 15, 16 and 17.

The mixture actuator N81

is operated by control unit M70

from pins 23, 24, 25 and 26.

The distribution actuator N80

is operated by control unit M70

from pins 19, 20, 21 and 22.

An electronic governor M72

activates the fan N85 on an earth command

at different speeds: it receives an ignition-controlled power supply (INT/A) from the line protected by fuse F31 of the junction unit under the dashboard B2

it receives a control unit input control signal from pin 10 and provides a feedback signal to pin 18 of M70

The fan N85

receives a direct supply from the line protected by fuse F5 of the engine compartment junction unit B1

Control unit M70 is connected, via the CAN line, from pins 12 and 13 to the Body Computer M1 and to node H44, exchanging the following signals: - speedometer signal; - screen washer engagement signal for activating the recirculation; - windows and sun roof closing command; - battery voltage signal; - heated rear windscreen on signal.