Program Button

Check the program button with the aid of the universal adapter with the control unit connected and ignition switched on. Measure between pin No. 19 and the specified pins. See Fig 1 Or Fig 2 . Number "0" corresponds to approximately zero volt, and "1" corresponds to approximately 12 volts. If inputs in control unit are not plausible, check ground connection to program button (pin No. 5 on E36; pin No. 31 on E34) and repair if necessary. See Fig 3 Or Fig 4 . If okay, remove program button. Check in accordance with switch diagram and replace if necessary. If okay, check wire and plug connection. Repair as necessary. If okay, replace control unit.

Fig 1: Testing Program Button (E36)

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Fig 2: Testing Program Button (E34)

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Fig 3: Identifying Program Button With Switching Diagram (E36)

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Fig 4: Identifying Program Button With Switching Diagram (E34)

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