Astra F
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Data, Engine Control Units and Diagnosis Information in Conjunction with Immobiliser Functions
Due to the different versions of engine control unit with immobiliser functions, the terminals to the engine control units are designated as follows in the circuit diagram:
SM Engine control unit SM1 Engine telltale (input, request signal, only petrol and 25 DT engines) SM2 Engine control unit (output, imo signal/odometer signal) WEG Odometer signal from speedometer or ABS control unit
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