Hyundai Santa Fe (2006 year). Manual — part 688
HA -130
HEATING, VENTILATION AND AIR CONDITIONING
DTC B1234 IN-CAR TEMPERATURE SENSOR OPEN (HIGH)
COMPONENT LOCATION
EE9B6B17
Incar Temperature Sensor
SCMHA6702L
GENERAL DESCRIPTION
E9F794B3
The incar temperature sensor located at crush pad, control unit contains a thermistor which measures the temperature of
the inside. The signal, decided by the resistance value which changes in accordance with perceived inside temperature,
is delivered to heater control unit and according to this signal, the control unit regulates incar temperature to intended
value.
DTC DESCRIPTION
E11DE569
The A/C controller sets DTC B1234 if there is an open circuit in incar temp. sensor signal harness or the measured
resistance value of sensor is more than threshold value(about 509.57kΩ )
DTC DETECTING CONDITION
E854B0E4
Item
Detecting Condition
Possible cause
DTC Strategy
• Resistance check
Threshold value
• > 509.57 kΩ
Detecting time
• 0.3 sec
FAIL SAFE
• Control with the value of 25 C(77 F)
• Open Circuit in harness
• Faulty incar temp. Sensor
• Faulty A/C control unit
SPECIFICATION
E1AB1CCB
Refer to DTC B1233.
MONITOR SCANTOOL DATA
E60EDB2F
1.
Connect scantool to data link connector(DLC).
2.
Engine "ON"
3.
Monitor the "INCAR TEMP. SENSOR" Parameter on the Scantool.
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -131
1.2 CURRENT DATA
FIX
SCRN FULL
PART GRPH HELP
13.0 C
25.0 C
11.5 C
12.5 C
0.00 V
75.68 %
89.79 %
255
HEATER WATER TEMP. SNSR
IN-CAR TEMP. SENSOR
AMBIENT AIR TEMP. SNS
EVAPORATIVE SENSOR
DRIVER PHOTO SENSOR
AIR MIX POPENTIO. (DR.)
DIRECTION POTENIO. DR.
PASSENGER PHOTO SENSOR
1.1 DIAGNOSTIC TROUBLE CODES
NUMBER OF DTC : 1 ITEMS
PART
ERAS
HELP
B1234 IN-CAR TEMP. SNSR HIGH
Fig 1 : The current data in abnormal state.
Fig 2 : DTC B1234.
Fig. 1
Fig. 2
EQBF515A
4.
Are the DTC B1234 present and is parameter of "INCAR TEMP. SENSOR" fixed?
※
Parameter of "INCAR TEMP. SENSOR" will be fixed at 25℃(77℉), if there is any fault in INCAR TEMP. 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
E941866C
Refer to DTC B1233.
SIGNAL CIRCUIT INSPECTION
E1781154
1.
Check for open in harness.
1) Ignition "OFF"
2) Disconnect incar temp. sensor.
3) Measure resistance between terminal "4" of incar temp. sensor and terminal "5" of A/C Control Unit..
Specification : Approx. 0 Ω
HA -132
HEATING, VENTILATION AND AIR CONDITIONING
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
SCMHA6532L
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
EF779270
1.
Check for open in ground harness.
1) Ignition "OFF"
2) Disconnect incar temp. sensor.
3) Measure resistance between terminal "2" of incar temp. sensor and terminal "12" 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(+)
Ω
14 13
16
18
SCMHA6533L
4) Is the measured resistance within specifications?
YES
Go to "Component Inspection " procedure.
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -133
NO
Check for open in ground harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
COMPONENT INSPECTION
EB9720FD
Refer to DTC B1233.
VERIFICATION OF VEHICLE REPAIR
E10F3C2D
Refer to DTC B1233.
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