Hyundai Santa Fe (2006 year). Manual — part 678
HA -90
HEATING, VENTILATION AND AIR CONDITIONING
Fig 3 : Signal waveform of Humidity sensor.
Fig 4 : Frequency of Humidity sensor Measured by scantool.
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.
If the problem is corrected, replace Humidity sensor and then go to "Verification of Vehicle Repair" procedure.
2.
Check A/C Control Unit
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -91
1) Engine "ON"
2) Disconnect Humidity Sensor.
3) Measure voltage value between terminal "4" of A/C control unit and chassis ground.
Specification : 5V
1
12
15
17
19
14 13
16
18
20
21
22
2
3
4
5
6
7
8
9
10
11
4. Humidity sensor signal
v
SCMHA6504L
4) Is the measured voltage within specification?
YES
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.
NO
Substitute with a known-good A/C Control Unit and check for proper operation.
If the problem is corrected, replace A/C Control Unit and then go to "Verification of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
E0FE9B19
After a repair, it is essential to verify that the fault has been corrected.
1.
Connect scantool and select "Diagnostic Trouble Codes(DTCs)" mode and then clear DTC.
2.
Operate the vehicle and monitor the DTC on the scantool.
3.
Are any DTCs present?
YES
Go to the applicable troubleshooting procedure.
NO
System is performing to specification at this time.
HA -92
HEATING, VENTILATION AND AIR CONDITIONING
DTC B1201 HUMIDITY SENSOR SHORT (LOW)
COMPONENT LOCATION
E7DBA350
Humidity Sensor
SCMHA6500L
GENERAL DESCRIPTION
E40CCE08
Humidity sensor located at crush pad, detects in-car humidity for in-car humidity control. If ambient air temperature or
in-car humidity is outside certain range, it will turn on A/C to control in-car humidity for preventing in-car fogging. Air
conditioner operation depends on ambient temperature and humidity.
DTC DESCRIPTION
ED9AB2BE
The A/C controller sets DTC B1201 if there is a short circuit in humidity sensor signal harness or the measured frequency
value of sensor is less than threshold value(about 6,186㎐)
DTC DETECTING CONDITION
ED9D02C4
Item
Detecting Condition
Possible cause
DTC Strategy
• Frequency check
Threshold value
• < 6,186 Hz
Detecting time
• 10msec
FAIL SAFE
• Control with the value of 10%
• Open Circuit in power
harness
• Short Circuit in signal harnes
• Faulty Humidity Sensor
• Faulty A/C control unit
SPECIFICATION
E39EABFF
Refer to DTC B1200.
MONITOR SCANTOOL DATA
E1282110
1.
Connect scantool to data link connector(DLC).
2.
Engine "ON"
3.
Monitor the "Humidity Sensor" Parameter on the Scantool while drying the humidity sensor with a hair drier or heat
gun adjusted to a low heat setting.
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -93
1.2 CURRENT DATA
FIX
SCRN FULL
PART GRPH HELP
10
12.0 C
11.0 C
11.5 C
12.5 C
0.00 V
91.75 %
89.79 %
HUMIDITY SENSOR
HEATER WATER TEMP. SNSR
IN-CAR TEMP. SENSOR
AMBIENT AIR TEMP. SNS
EVAPORATIVE SENSOR
DRIVER PHOTO SENSOR
AIR MIX POPENTIO. (DR.)
DIRECTION POTENIO. DR.
1.1 DIAGNOSTIC TROUBLE CODES
NUMBER OF DTC : 1 ITEMS
PART
ERAS
HELP
B1201 HUMIDITY SENSOR - SHORT(LOW)
Fig 1 : The current data in abnormal state.
Fig 2 : DTC B1201.
Fig. 1
Fig. 2
EQBF511A
4.
Are the DTC B1201 present and is parameter of "Humidity Sensor" fixed?
※
Parameter of "Humidity Sensor" will be fixed at 10%, if there is any fault in Humidity Sensor.
YES
Go to "Inspection" procedure.
NO
Fault is intermittent caused by poor contact in the sensor’s and/or A/C controller’s connector or was repaired and
A/C controller memory was not cleared. Thoroughly 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.
TERMINAL AND CONNECTOR INSPECTION
E46CEF9E
Refer to DTC B1200.
SIGNAL CIRCUIT INSPECTION
ECC3D1A0
1.
Check for short to ground in harness.
1) Ignition "OFF"
2) Disconnect Humidity Sensor.
3) Measure resistance between terminal "3" of Humidity Sensor and chassis ground.
Specification : Approx. ∞ Ω
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