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Home >> Mazda >> 1990 >> 323 SE, Standard >> Repair and Diagnosis (Single Page) >> Electrical >> Gauges >> Instrument Panel - Standard >> Component Testing >> Oil Pressure Gauge >> Resistance Test (RX7)

Resistance Test (RX7)

  1. Disconnect wiring harness connector from oil pressure gauge sending unit. Connect Red lead of Checker (49-0839-285) to wiring harness connector and Black lead to ground.
  2. Set checker to specified resistance values and ensure oil pressure gauge gives proper indication. See OIL PRESSURE GAUGE RESISTANCE  .
  3. If gauge does not function as described, check wiring harness. If harness is okay, remove instrument cluster and check gauge. If gauge is okay, replace sending unit.
NOTE: On RX7 models, oil pressure is slightly lower when engine is cold because eccentric shaft by-pass valve operates.
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