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Home >> Infiniti >> 1994 >> Q45 a >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Engine Control Module (ECM) >> Ground Circuits

Ground Circuits

  1. Using an ohmmeter, check for continuity to ground on ECM terminals No. 10, 20, 50, 60, 107, 108 and 116. Resistance should be zero ohms. If resistance is not zero ohms, repair open to ground.
  2. Using a DVOM, touch negative lead of voltmeter to a good ground. Using positive lead of voltmeter, backprobe each ground terminal at ECM connector. With vehicle running, voltmeter should indicate less than one volt. If voltmeter reading is greater than one volt, check for open, corrosion or loose connection on ground lead.
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