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A/c Compressor Controls (Full Auto): Diagnosis Kia Optima II

Automatic HVAC System ~110 words

INSPECTION

  1. Ignition "ON".
  2. Blow air with changing temperature to the in car sensor air inlet. Measure sensor resistance between 2 and 4 terminals.
  1. Ignition "ON".
  2. Using the scan tool.
  3. Check the frequency of humidity sensor between terminals 2 and 3. FREQUENCY OF HUMIDITY SENSOR CHART Humidity (%) Frequency between terminals 2and 3 (Hz) 30 6976 +/- 5% 50 6728 +/- 5% 60 6600 +/- 5% 70 6468 +/- 5% 80 6330 +/- 5% 90 6186 +/- 5%
  4. If the measured resistance is not specification, substitute with a known-good humidity sensor and check for proper operation.
  5. If the problem is corrected, replace the Humidity sensor.

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