Mass Airflow (MAF) Sensor
- Faults in MAF sensor or circuit should set a service code. See QUICK TEST in G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section. If service code has not been set, install Breakout Box (T83L-50-EEC-IV), leaving PCM connected. Start engine, and allow it to idle.
- On 2.3L OHC, measure voltage between test pin No. 14 and negative battery terminal. On all other models, measure voltage between test pin No. 50 and negative battery terminal. On all models, if voltage is not .36-1.50 volts, replace MAF sensor. If voltage is .36-1.50 volts, MAF sensor is okay. See CIRCUIT TEST DC in G - TESTS W/CODES - EEC-IV (1.9L) article in the ENGINE PERFORMANCE Section for circuit testing.