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Home >> Mazda >> 1994 >> B2300 SE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Powertrain Control Module >> Ground Circuits

Ground Circuits

  1. Locate Powertrain Control Module (PCM) in the left rear of engine compartment. Using a DVOM, check for continuity to ground on PCM terminals No. 40 and 60. See Figure. Reading on DVOM should be zero ohms. If reading is not zero ohms, repair open to ground.
  2. Using a voltmeter, touch negative lead of voltmeter to a good ground. Touch positive lead of voltmeter to each ground terminal. With engine running, voltmeter should indicate less than one volt. If reading is one volt or more, check for open, corrosion and loose connection on ground lead.
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