Up to M.Y. 1997

Air Conditioning (A/C)

Models 129 up to MY 1997

Electrical Test Program (ETP) (Compressor Shut-Off) - Preparations for Test [25]

- Check ground connection for A/C pushbutton control module (N22) by turning ignition "ON" and pressing . Connect voltmeter ( + ) to terminal block, terminal 30/30U/61e/87L (X4/10) and test both connections of dual function A/C compressor pressure switch (S31/1) in series for ground. If there is no ground signal on either connection test the A/C compressor signal ( 23 25.0 ). If there is a ground signal to only one of the connections, test A/C system pressure. If the pressure is above 3 bar, replace dual function A/C compressor pressure switch (S31/1). If the pressure is below 2 bar, add 200 g refrigerant (R12 or R134a). Check for leaks and repaair if necessary (see connection diagram for signal test).

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