Hyundai Santa Fe (2006 year). Manual — part 677
HA -86
HEATING, VENTILATION AND AIR CONDITIONING
DTC B1200 HUMIDITY SENSOR OPEN (HIGH)
COMPONENT LOCATION
E55A86D0
Humidity Sensor
SCMHA6500L
GENERAL DESCRIPTION
E813CFB8
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
E26F8FC5
The A/C controller sets DTC B1200 if there is an open circuit in humidity sensor signal harness or the measured frequency
value of sensor is more than threshold value(about 7,100㎐)
DTC DETECTING CONDITION
E609B0DF
Item
Detecting Condition
Possible cause
DTC Strategy
• Frequency check
Threshold value
• > 7,100 Hz
Detecting time
• 10msec
FAIL SAFE
• Control with the value of 10%
• Open Circuit in signal
harness
• Faulty Humidity Sensor
• Faulty A/C control unit
SPECIFICATION
EF7B8179
Relative humidity(%)
Frequency(Hz)
Relative humidity(%)
Frequency(Hz)
20
7,100
60
6,600
30
6,976
70
6,468
40
6,853
80
6,330
50
6,728
90
6,186
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -87
MONITOR SCANTOOL DATA
EA55BAF5
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.
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
B1200 HUMIDITY SENSOR - OPEN(HIGH)
Fig 1 : The current data in abnormal state.
Fig 2 : DTC B1200.
Fig. 1
Fig. 2
EQBF510B
4.
Are the DTC B1200 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
E5F388B6
1.
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or
damage.
3.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
HA -88
HEATING, VENTILATION AND AIR CONDITIONING
NO
Go to "Signal circuit inspection" procedure.
SIGNAL CIRCUIT INSPECTION
EE9EA63F
1.
Check for open in harness.
1) Ignition "OFF"
2) Disconnect Humidity Sensor.
3) Measure resistance between terminal "3" of Humidity Sensor and terminal "4" of A/C Control Unit.
Specification : Approx. 0 Ω
1
12
15
17
19
20
21
22
2
3
4
5
6
7
8
9
10
11
1
2
3
5 4
6
1. Motor(-)
2. Sensor ground
3. Humidity sensor signal
4. In-car sensor temp. signal
5. Sensor power (5V)
6. Motor(+)
14 13
16
18
Ω
SCMHA6501L
4) Is the measured resistance within specifications?
YES
Go to "Ground circuit Inspection " procedure.
NO
Check for open in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
GROUND CIRCUIT INSPECTION
E607AF32
1.
Check for open in ground harness.
1) Ignition "OFF"
2) Disconnect Humidity Sensor.
3) Measure resistance between terminal "2" of Humidity Sensor and terminal "12" of A/C Control Unit.
Specification :Approx. 0 Ω
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -89
1
12
15
17
19
20
21
22
2
3
4
5
6
7
8
9
10
11
1
2
3
5 4
6
1. Motor(-)
2. Sensor ground
3. Humidity sensor signal
4. In-car sensor temp. signal
5. Sensor power (5V)
6. Motor(+)
Ω
14 13
16
18
SCMHA6502L
4) Is the measured resistance within specifications?
YES
Go to "Component Inspection " procedure.
NO
Check for open in ground harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
COMPONENT INSPECTION
E3A920B6
1.
Check Humidity Sensor.
1) Engine "ON"
2) Connect Humidity Sensor.
3) Measure Frequency between terminal "3" and "2" of Humidity sensor while increasing humidity.
Specification : Refer the specifications in fig 5.
1
2
3
5 4
6
1. Motor(-)
2. Sensor ground
3. Humidity sensor signal
4. In-car sensor temp. signal
5. Sensor power (5V)
6. Motor(+)
H
SCMHA6503L
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