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Home >> Saab >> 1998 >> 9000 2.3 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Electronic Control Module (ECM) (900 Series With MOTRONIC System) >> Ground Circuit
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Ground Circuit

  1. Turn ignition off. Connect negative lead of ohmmeter to ground. Backprobe ECM terminals No. 6 (Black wire), No. 28 (Black wire), No. 34 (Black wire), No. 55 (Black wire), and No. 71 (Brown/White wire). Resistance should be zero ohms for each wire. If resistance is as specified, go to next step. If resistance is not as specified, repair open circuit to ground.
  2. Connect negative lead of DVOM to a good ground. Backprobe each terminal specified in step 1). With vehicle running, DVOM should indicate less than one volt. If voltage is more than one volt, inspect for open circuit, corrosion, or loose connection on appropriate ground lead.
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