Hyundai Santa Fe (2006 year). Manual — part 695
HA -158
HEATING, VENTILATION AND AIR CONDITIONING
VERIFICATION OF VEHICLE REPAIR
E883B840
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.
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -159
DTC B1246 AIR MIX POTENTIOMETER SHORT (HIGH) - DRIVER
COMPONENT LOCATION
E3948C9B
Temperature Control Actuator
SCMHA6705L
GENERAL DESCRIPTION
E8B15D5D
Temperature control actuator located at heater unit, regulates the temperature by the procedure as follows. Signal from
control unit adjusts position of temp. door by operating temp. motor and then temperature will be regulated by the hot/cold
air ratio decided by position of temp. door.
DTC DESCRIPTION
ECABD6D9
The A/C controller sets DTC B1246 if there is a short to power in the air mix potentiometer.
DTC DETECTING CONDITION
E946FDCA
Item
Detecting Condition
Possible cause
DTC Strategy
• Voltage check
Threshold value
• > 4.9V
Detecting time
• 0.3 sec
FAIL SAFE
• If temperature setting 17~24.5 C(63~76 F) fix
at max. cooling position.
• If temperature setting 25~32 C(77~90 F) fix
at max. heating position.
• Short circuit in harness
• Faulty driver Air Mix
potentiometer
SPECIFICATION
ED6C5BE4
Refer to DTC B1245.
MONITOR SCANTOOL DATA
E0F5D9A1
1.
Connect scantool to Data Link Connector(DLC).
2.
Engine "ON"
HA -160
HEATING, VENTILATION AND AIR CONDITIONING
3.
Monitor the "Driver Air Mix Potentiometer" Parameter on the Scantool while operating temp. switch.
1.1 DIAGNOSTIC TROUBLE CODES
NUMBER OF DTC : 1 ITEMS
PART
ERAS
HELP
B1246 AIR MIX P. - HIGH INPUT
1.2 CURRENT DATA
FIX
SCRN FULL
PART GRPH HELP
13.0 C
12.0 C
12.0 C
12.5 C
0.00 V
91.75 %
90.18 %
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
Fig 1 : The current data in abnormal state.
Fig 2 : DTC B1246.
Fig. 1
Fig. 2
EQBF522A
4.
Are the DTC B1246 present and is parameter of "Driver Air Mix potentiometer" fixed?
※
Parameter of "Driver Air Mix potentiometer" will be fixed at 100%(or any value above 90%), or 0% (or any value
below 10%), if there is any fault in Driver Air Mix potentiometer.
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
EFE9FA90
Refer to DTC B1245.
SIGNAL CIRCUIT INSPECTION
EC608CD7
1.
Check for short in harness.
1) Ignition "OFF"
2) Disconnect Driver Air Mix potentiometer.
3) Measure resistance between terminal "6" and "5" of Driver Air Mix potentiometer.
Specification : Approx. ∞ Ω
BLOWER AND A/C CONTROLS (AUTOMATIC)
HA -161
*
*
3
4
5
6
7
3. Motor (Cool)
4. Motor (Warm)
5. Sensor reference voltage(+5V)
6. Potentiometer signal
7. Potentiometer ground
Ω
SCMHA6549L
4) Is the measured resistance within specifications?
YES
Go to "Ground circuit Inspection" procedure.
NO
Check for short to power harness in signal harness. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.
GROUND CIRCUIT INSPECTION
E4163DA5
1.
Check for open in harness.
1) Ignition "OFF"
2) Disconnect Driver Air Mix Potentiometer.
3) Measure resistance between terminal "7" of Driver Air Mix Potentiometer and chassis ground.
Specification : Approx. 0 Ω
*
*
3
4
5
6
7
3. Motor (Cool)
4. Motor (Warm)
5. Sensor reference voltage(+5V)
6. Potentiometer signal
7. Potentiometer ground
Ω
SCMHA6550L
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.
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