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.
P/N Recognition
Automatic Transmission Only - Connect DVOM between ME-SFI control module connector "D" terminal No. 19 and ME-SFI control module connector "A" terminal No. 2 (socket box terminals No. 51 and 2). Turn ignition on. With selector lever in "P" or "N" positions, voltage should be 11-14 volts. With selector lever in any other position, voltage should be less than 2 volts. If voltage is within specification, test is complete. If voltage is not within specification, possible causes are wiring harness failure or transmission related failure. See appropriate ELECTRONIC CONTROLS article in TRANSMISSIONS. Repair as necessary.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.