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Pcm Power Relay

  1. Remove PCM power relay from engine compartment relay block. Using DVOM, measure resistance between PCM power relay terminals "C" and "D". See Figure . Resistance should be 40-120 ohms. Measure resistance between PCM power relay terminals "C" and "A", and between terminals "C" and "B". Resistance should be greater than 10,000 ohms.
  2. Connect 12 volts to PCM power relay terminals "C" and "D". Using DVOM, check continuity between PCM power relay terminals "A" and "B". Continuity should exist. If specifications are not as specified, replace PCM power relay.
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