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Home >> Mazda >> 1979 >> RX-7 GS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Auxiliary Controls >> Testing >> Control Unit >> All Models (Except California)
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All Models (Except California)

  1. Check condition of 5-amp fuse. Fuse is located under cover, on side of control unit. See Fig 1. Check that current flows to terminals "A" and "B" when engine is operating at idle (about 3-8 volts).
  2. Connect negative probe of voltmeter to terminal "P" and positive probe to other terminals under conditions described. Check that 12 volts exists between terminal "J" and "L" with engine speed decreasing and under 1150 RPM.
  3. Check that 12 volts exists at terminal "D" with engine operating at any speed. Check that 12 volts exists at terminal "H" with increasing engine speed over 4000 RPM. Check that 12 volts exists at terminal "G" with decreasing engine speed over 1150 RPM.
Fig 1: Control Unit Terminal Identification (All Models Except California)
G09309992Courtesy of MAZDA MOTORS CORP.
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