Heating and Air Conditioning: Diagrams

Connector View:

Connector A (black)
1 - K-lead
2 - Not used
3 - Not used
4 - Not used
5 - Terminal 58 d
6 - Not used
7 - Outside temperature sensor
8 - Not used
9 - Not used
10 - Interior temperature sensor
11 - Not used
12 - Ground for sensors and potentiometers


Connector B (red)
1 - Not used
2 - Not used
3 - Not used
4 - Not used
5 - Footwell blower outlet sensor
6 - Not used
7 - Not used
8 - Position of temperature mixing valve
9 - Position of central valve
10 - Position of footwell / defrost valve
11 - Not used
12 - Not used
13 - Interface, instrument cluster
14 - Not used
15 - Not used
16 - Not used
17 - Position of outside air / recirculation valve
18 - Sun sensor
19 - Not used
20 - Not used

Connector C (beige)
1 - Not used
2 - Feedback signal, compressor
3 - Not used
4 - Not used
5 - Not used
6 - Not used
7 - Terminal 58
8 - Output + 5 volts
9 - Not used
10 - Not used
11 - Feedback signal, fresh-air blower, negative
12 - Not used
13 - Not used
14 - Feedback signal, fresh-air blower, positive
15 - Not used
16 - Actuation of fresh-air blower (driver)

Connector D (black)
1 - Not used
2 - Temperature mixing valve motor
3 - Footwell/defrost valve motor
4 - Central valve motor
5 - Outside air/recirculation valve motor
6 - Air-conditioning compressor demand on
7 - Not used
8 - Not used
9 - Terminal 15
10 - Temperature mixing valve motor
11 - Footwell/defrost valve motor
12 - Central valve motor
13 - Outside air/recirculation valve motor
14 - Not used
15 - Terminal 31
16 - Not used