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Mass Airflow (Ma) Sensor

  1. Faults in MA sensor or circuit should set a service code. See QUICK TEST in TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section. If service code has not been set, install Breakout Box (014-00322), leaving ECA connected. Start engine, and allow it to idle.
  2. On 2.3L OHC, measure voltage between test pin No. 14 and negative battery cable. On all other models, measure voltage between test pin No. 50 and negative battery cable. If voltage is not .36-1.50 volts, replace MA sensor. If voltage is .36-1.50 volts, MA sensor is okay. See CIRCUIT TEST DC in TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section for circuit testing.
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