Connect GDS with Diagnostic Connector.
Warm up the engine to normal temperature after engine starts.
Select and monitor "Auto defogger sensor" parameter with GDS.
Check frequency or the value of auto Defog sensor is changed on the scantool by increasing or decreasing humidity near the defog sensor.
Specification : Refer the specifications in Fig.1)
Fig.1) If the DTC related auto defogger sensor is set, A/C control Module regards and controls humidity as 0%.
humidity (%RH) | DUTY |
30 | 30% |
40 | 40% |
50 | 50% |
60 | 60% |
70 | 70% |
80 | 80% |
90 | 90% |
Fig.2) The frequency of auto defog sensor according to the humidity
Is the measured value within the specification?
 | ▶ Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Substitute with a known-good Auto Defog sensor and check for proper operation. If the problem is corrected, replace Auto Defog sensor and then go to "Verification of Vehicle Repair" procedure. |
