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Home >> Volvo >> 1993 >> 850 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Electronic Control Unit - Ignition >> Notes
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Electronic Control Unit - Ignition: Notes

NOTE: When measuring resistance and voltage at ECU, use Measuring Unit (
981 3190) and Adapter (981 3195
). See Figure . DO NOT  measure resistance and voltage at ECU connector. Before disconnecting/connecting control unit connector, disconnect negative battery cable.
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