The following is required for troubleshooting Porsche System Tester

Recondition Battery Guide
547 - 96

Connector assignment, heating/air conditioning control

Porsche 924 Fresh Air Blower Switch

Connector A (black)

1 - K-line 7 - Outside temperature sensor

4 - Free 10 - Interior temperature sensor

6 - Free 12 - Ground for sensors and potentiometers

Connector B (red)

5 - Footwell blower outlet sensor

8 - Temperature mixing valve position

9 - Central valve position

10 - Footwell / defrost valve position

13 - Interface, instrument cluster

17 - Position of outside air / recirculation valve

18 - Sun sensor

Connector C (beige)

2 - Feedback signal, compressor

7 - Terminal 58

11 - Feedback signal, fresh-air fan minus

14 - Feedback signal, fresh-air fan plus

16 - Activation of fresh-air fan (driver)

Connector D (black)

2 - Temperature mixing valve motor

3 - Footwell / defrost valve motor

4 - Central valve motor

5 - Outside air / recirculation valve motor

6 - Air conditioning compressor On demand

9-Terminal 15

10 - Temperature mixing valve motor

11 - Footwell / defrost valve motor

12 - Central valve motor

13 - Outside air / recirculation valve motor

15 - Terminal 31

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