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Home >> Mazda >> 1990 >> RX-7 Base, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> LOGICON Switch Assembly Testing >> Temperature Control Circuit
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Temperature Control Circuit

  1. Set temperature control lever to center position. Connect jumper wire between terminals "D" and "E" of 17-pin female connector and measure voltage between terminals "F" and "G". See Fig 1 . Reading should be 12 volts. If voltage is correct, go to step 2). If voltage is not correct, replace logicon switch.
    Fig 1: Identifying Logicon Switch Assembly Connectors
    G90A04531Courtesy of MAZDA MOTORS CORP.
  2. Disconnect jumper wire. Connect jumper wire between terminals "C" and "D" of 17-pin female connector and measure voltage between terminals "F" and "G". Reading should be 12 volts. If reading is not 12 volts, replace logicon switch.
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