Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1979 Mazda RX-7 GS, Automatic TransFACTORY OEM SERVICE PROCEDURE
All Models (Except California)
- 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).
- 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.
- 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.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.