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Heater & A/c Control Unit Hyundai Santa Fe III

Automatic HVAC System 12 illustrations ~374 words

Scheme 67

Scheme 67: Component
Scheme 67: Component

[Connector A]

Pin NoFunction
Without Rear HeaterWith Rear Heater
1GroundGround
2Middle HighMiddle High
3Middle LowMiddle Low
4HighHigh
5CommonCommon
6LowLow

[Connector B]

Pin NoFunction
Without Rear HeaterWith Rear Heater
1BatteryBattery
2Illumination + (Tail)Illumination + (Tail)
3Sensor REF (+5V)Sensor REF (+5V)
4Mode Actuator FeedbackMode Actuator Feedback
5Temperature Actuator FeedbackTemperature Actuator Feedback
6Intake Actuator FeedbackIntake Actuator Feedback
7Evaporator Sensor (+)Evaporator Sensor (+)
8Ambient Temperature Sensor (+)Ambient Temperature Sensor (+)
9Blower Motor (+)
10Blower CommonMosfet Drain Feedback
11HTDHTD
12Mode Actuator (Vent)Mode Actuator (Vent)
13Mode Actuator (Defrost)Mode Actuator (Defrost)
14Mode Actuator (Cool)Mode Actuator (Cool)
15Temperature Actuator (Warm)Temperature Actuator (Warm)
16Intake Actuator (Fresh Air)Intake Actuator (Fresh Air)
17Intake Actuator (Recirculated Air)Intake Actuator (Recirculated Air)
18Hazard SwitchHazard Switch
19Mosfet Gate
20Illumination - (Rheostat)Illumination - (Rheostat)
21Ignition 2Ignition 2
22Ignition 1Ignition 1
23Passenger Air Bag Ignition 1Passenger Air Bag Ignition 1
24Passenger Air Bag OFF SignalPassenger Air Bag OFF Signal
25
26Seat Belt Reminder (SBR)Seat Belt Reminder (SBR)
27Rear Defog SwitchRear Defog Switch
28PTC Relay 2
29PTC Relay 3
30Detent Out (+)Detent Out (+)
31MAX Blower ON Signal
32C-CAN HighC-CAN High
33C-CAN LowC-CAN Low
34Rear C-Line
35ECV +ECV +
36ECV - (Ground)ECV - (Ground)
37PTC Relay 1
38Sensor GroundSensor Ground
39GroundGround
40GroundGround

Scheme 68

Scheme 68: Replacement
Scheme 68: Replacement

Scheme 69

Scheme 69
Scheme 69

Scheme 70

Scheme 70
Scheme 70
  1. Disconnect the negative (-) battery terminal.
  2. Remove the audio unit. Refer to «AUDIO UNIT»(/hyundai/santa-fe/iii-2012-2016/remont/entertainment-systems/#audio-system) .
  3. Separate the heater and A/C control unit (A) from the center fascia after loosening the mounting screws.
  4. Disconnect the connectors (A) and then remove the heater and A/C controller.
  5. Install in the reverse order of removal.

Scheme 71

Scheme 71: Component
Scheme 71: Component
Pin NoFunction
Without Rear HeaterWith Rear Heater
1Illumination + (Tail)Illumination + (Tail)
2Sensor REF (+5V)Sensor REF (+5V)
3C-CAN HighC-CAN High
4C-CAN LowC-CAN Low
5Mode Actuator (Vent)Mode Actuator (Vent)
6Mode Actuator (Defrost)Mode Actuator (Defrost)
7Mode Actuator FeedbackMode Actuator Feedback
8Intake Actuator (Fresh Air)Intake Actuator (Fresh Air)
9Intake Actuator (Recirculated Air)Intake Actuator (Recirculated Air)
10Intake Actuator FeedbackIntake Actuator Feedback
11K-LineK-Line
12HTDHTD
13Rear Defog SwitchRear Defog Switch
14Temperature Actuator (Cool) - PassengerTemperature Actuator (Cool) - Passenger
15Temperature Actuator (Warm) - PassengerTemperature Actuator (Warm) - Passenger
16Temperature Actuator Feedback - PassengerTemperature Actuator Feedback - Passenger
17Defogging Actuator (Open)Defogging Actuator (Open)
18Defogging Actuator (Close)Defogging Actuator (Close)
19Defogging Actuator FeedbackDefogging Actuator Feedback
20Illumination - (Rheostat)Illumination - (Rheostat)
21Detent Out (+)Detent Out (+)
22Hazard SignalHazard Signal
23Temperature Actuator (Cool) - DriverTemperature Actuator (Cool) - Driver
24Temperature Actuator (Warm) - DriverTemperature Actuator (Warm) - Driver
25Temperature Actuator Feedback - DriverTemperature Actuator Feedback - Driver
26Ambient Temperature Sensor (+)Ambient Temperature Sensor (+)
27Evaporator Temperature Sensor (+)Evaporator Temperature Sensor (+)
28Humidity (PWM)Humidity (PWM)
29Incar Sensor (+)Incar Sensor (+)
30Photo Sensor (-) - LeftPhoto Sensor (-) - Left
31Photo Sensor (-) - RightPhoto Sensor (-) - Right
32Ionizer DiagnosisIonizer Diagnosis
33
34Passenger Air Bag OFF SignalPassenger Air Bag OFF Signal
35Seat Belt Reminder (SBR)Seat Belt Reminder (SBR)
36
37ION SignalION Signal
38CLEAN SignalCLEAN Signal
39ECV +ECV +
40ECV - (Ground)ECV - (Ground)
Pin NoFunction
Without Rear HeaterWith Rear Heater
1GroundGround
2Sensor GroundSensor Ground
3M-CAN HighM-CAN High
4M-CAN LowM-CAN Low
5Blower INHMosfet Gate
6Blower PWM INMosfet Drain Feedback
7Passenger Air Bag Ignition 1Passenger Air Bag Ignition 1
8Ignition 1Ignition 1
9GroundGround
10PTC Relay 1
11PTC Relay 2
12PTC Relay 3
13Rear C-Line
14Blower PWM ISBlower Motor (+)
15Ignition 2Ignition 2
16BatteryBattery

Scheme 72

Scheme 72: Self Diagnosis
Scheme 72: Self Diagnosis

Scheme 73

Scheme 73
Scheme 73

Scheme 74

Scheme 74
Scheme 74

Scheme 75

Scheme 75
Scheme 75
  1. Self-diagnosis process
  2. How to read self-diagnostic code After the display panel blinks three times every 0.5 second, the corresponding fault code blinks on the setup temperature display panel every 0.5 second and will show two figures. Codes are displayed in numerical format. FAULT CODE DESCRIPTION Display Fail description 00 Normal 11 In-car sensor open 12 In-car sensor short 13 Ambient sensor open 14 Ambient sensor short 17 Evaporator sensor open 18 Evaporator sensor short 19 Temp door potentiometer open/short- Drive 20 Temp door potentiometer fault- Drive 21 Mode door potentiometer open/short - Passenger 22 Mode door potentiometer fault - Passenger 23 Auto defogging sensor open 24 Auto defogging sensor short 25 Intake door potentiometer open 26 Intake door potentiometer short 32 Temp door potentiometer open/short - Passenger 33 Temp door potentiometer fault - Passenger 43 Defog door potentiometer open/short 44 Defog door potentiometer fault 45 APT (A/C Pressure Transducer) CAN signal fault 47 RPM CAN signal fault 48 Vehicle speed CAN signal fault 49 Engine coolant temperature CAN signal fault 50 Cluster ion generator fault 85 Blower motor restriction
  3. Fault code display Continuance operation: None or one DTC code. Continuance operation: Two or more DTC code. STEP operation Normal or one fault code is same as a continuance operation. Two or more DTC code.
  4. If fault codes are displayed while checking, inspect for malfunction causes by referring to the fault code table.
  5. Fail Safe
NoSensorFail ConditionFail Safe Function
1In-car sensor< 0.1V or > 4.9V25°C (77°F)
2Ambient temperature sensor< 0.1V or > 4.9V20°C (68°F)
3Evaporator temperature sensor< 0.1V or > 4.9V2°C (28.4°F)
4Temperature control actuator feedback< 0.1V or > 4.9VSetting temperature is 24.5°C (76.1°F) or below: Max cool
Setting temperature is 25.0°C (77°F) or above: Max hot
5Mode control actuator feedback< 0.5V or > 4.5VVent: Vent
Others: Defog
6Intake actuator feedback< 0.1V or > 4.9VRecirculation: Recirculation
Others: Fresh
7Auto defogging sensor (Relative humidity)Communication failRelative humidity: 0%
8Auto defogging sensor (Glass temperature)< 0.1V or > 4.9V
9Engine coolant temperatureCommunication fail2°C(28.4°F)
10ECV feedbackNo input of ECV feedback signalA/C output: OFF ECV output: OFF Torque: 1Nm

Scheme 76

Scheme 76: Replacement
Scheme 76: Replacement

Scheme 77

Scheme 77
Scheme 77

Scheme 78

Scheme 78
Scheme 78
  1. Disconnect the negative (-) battery terminal.
  2. Remove the audio unit. Refer to «AUDIO UNIT»(/hyundai/santa-fe/iii-2012-2016/remont/entertainment-systems/#audio-system) .
  3. Separate the heater and A/C control unit (A) from the center fascia after loosening the mounting screws.
  4. Disconnect the connectors (A) and then remove the heater and A/C controller.
  5. Install in the reverse order of removal.

See also:
• AUDIO UNIT

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