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Home >> Mazda >> 1988 >> RX-7 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> CEC System >> Trouble Shooting >> Self-Diagnosis >> Trouble Code No. 07
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Trouble Code No. 07

  1. Check all connections and repair as necessary. Check for battery voltage at BLK/WHT wire of boost sensor (non-turbo) or pressure sensor (turbo). If no voltage exists, check for open circuit from main relay to sensor.
  2. If voltage exists, check for voltage at BRN/WHT wire of boost sensor (non-turbo) or pressure sensor (turbo). Voltage should be 4.5-5.5 volts. If voltage is not within specification, check for open or short circuit or defective ECU.
  3. If voltage is correct, check boost or pressure sensor operation. See BOOST OR PRESSURE SENSOR under COMPONENT TESTING  in this article. If sensor operates properly, check for continuity between BRN/RED wire at sensor and ECU terminal "2B" and Black or BLK/BRN wire at sensor and ECU terminal "2C". Determine terminal identification. See Figure .
  4. If no continuity exists, check for open or shorted circuit. If continuity exists, ECU is defective.
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