|
|
HA -90 HEATING, VENTILATION AND AIR CONDITIONING Fig 3 : Signal waveform of Humidity sensor. Fig. 3 Fig. 4 EQBF510F 7,224 7,100 6,976 6,853 6,728 6,600 6,468 6,330 6,186 6,000 6,200 6,400 6,600 6,800 7,000 7,200 7,400 0 10 20 30 40 50 60 70 80 90 100 Fr equency Fig 5) Specifications : Frequency value of humidity sensor as a function of Relative humidity. Fig. 5 (Hz) Humidity(%) EQBF510Q 4) Is the measured frequency within specifications in fig 5? (tolerance limits ± 5%) YES Go to "Check A/C Control Unit" procedure. NO Substitute with a known-good Humidity sensor and check for proper operation. 2. Check A/C Control Unit |