1986 Mazda 626 BaseFACTORY OEM SERVICE PROCEDURE

Code 2 (Airflow Meter)

  1. Check for poor connections in airflow meter connector. Repair or replace as necessary. If connections are okay, check airflow meter resistance. See AIRFLOW METER  .
  2. If resistance is incorrect, replace airflow meter. If resistance is correct, check for battery voltage at terminal "Vb" of airflow meter connector.
  3. If voltage is not present, check for open or short circuit in wiring harness. If voltage is present, measure voltage at terminal "2B" of ECU. If reading is zero volts, check for open or short circuit in wiring harness from "Vc" terminal of airflow meter to terminal "2B" of ECU connector.
  4. If reading is about 12 volts, check for open circuit in wiring harness from "E2" terminal of airflow meter to ECU connector. If reading is 6-10 volts, go to next step.
  5. Measure voltage at terminal "2E" of ECU. If voltage is within .7-2.7 volts, replace faulty ECU. If voltage is outside range, check for open or short circuit in wiring harness from "Vs" terminal of airflow meter to ECU connector.
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.

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