Hyundai Genesis: Controller / Heater & A/C Control Unit Repair procedures

Self Diagnosis

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 Fault Code Control Unit Fail Description 0 Normal 11 In-car temperature sensor open 12 In-car temperature sensor short  13 Ambient temperature sensor open  14 Ambient temperature sensor short  17 Evaporator temperature sensor open  18 Evaporator temperature sensor short  19 Temp door potentiometer open/short (Driver's side) 20 Temperature door potentiometer motor (Driver's side) 21 Mode door potentiometer open/short (Driver's side) 22 Mode door potentiometer motor 23 Auto defogging sensor open 24 Auto defogging sensor short 25 Intake door potentiometer open/short 26 Intake door potentiometer motor 27 AQS sensor open 28 AQS sensor short 31 AQS sensor fault 32 Temperature door potentiometer open/short (Passenger's side) 33 Temperature door potentiometer motor (Passenger's side) 34 Console temperature door potentiometer open/short 35 Console temperature door potentiometer motor 36 Console temperature door A potentiometer open/short 37 Console temperature door A potentiometor motor 38 Console duct actuator open/short 39 Console duct actuator motor 43 Auto defogging potentiometer open/short 44 Auto defogging potentiometer motor 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 ionizer fault 51 Rear in-car temperature sensor open 52 Rear in-car temperature sensor short 53 Console duct sensor open 54 Console duct sensor short 55 Cool & Warm box - Thermistor fault 56 Cool & Warm box - Peltier fault 57 Cool & Warm box - Fan pressure fault 58 Cool & Warm box - Fan locking 59 Cool & Warm box - Fan fault

3.	Fault code display (1) Continuance operation : None or one DTC code. (2) Continuance operation : Two or more DTC code. (3) STEP operation A. None or one fault code is deemed as continuance operation. B. 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 No. Sensor and Signal Fail Safe Function 1 In-car sensor 25°C (77°F) 2 Rear in-car sensor 25°C (77°F) 3 Ambient temperature sensor 20°C (68°F) (Screen: "---" °C or "---°F") 4 Auto defogging sensor (Relative humidity) Humidity :  0% 5 Cluster ionizer - 6 Evaporator temperature sensor -2°C (28.4°F) 7 AQS sensor - 8 Electric control valve (ECV) - 9 Vehicle speed (VS) 0 kph 10 Vehicle speed (VS) - TCU 0 kph 11 Engine Speed 650 RPM 12 Error-engine speed signal 650 RPM  13 Throttle position signal 0% 14 Engine coolant temperature -2°C (28.4°F) 15 Max torque limitation of A/C compressor 0 Nm 16 APT sensor output value 0 hPa 17 Activation of air conditioner compressor relay - 18 Engine idle target speed - 19 Console duct sensor - No. Actuator Fail Safe Function 1 Temperature control actuator feedback Setting temperature is 24.5°C (76.1°F) or below : Max cool Setting temperature is 25.0°C (77°F) or above : Max hot 2 Mode control actuator feedback Vent: Vent Others: Defrost 3 Intake actuator feedback Recirculation: Recirculation Others: Fresh 4 Auto defogging actuator feedback Vent and B/L : Close  Others : Open  5 Console temperature control actuator Setting temperature is 24.5°C (76.1°F) or below : Max cool Setting temperature is 25.0°C (77°F) or above : Max hot 6 Console temperature control actuator A feedback Setting temperature is 24.5°C (76.1°F) or below : Max cool Setting temperature is 25.0°C (77°F) or above : Max hot 7 Console duct actuator feedback Vent: Vent Others: Floor ? For more information, refer to the DTC guide.

Replacement

Put on gloves to protect your hands.

• Use a plastic panel removal tool to remove interior trim pieces to prevent damage to the surface. • Take care not to bend or scratch the trim and panels.

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad side garnish assembly [RH] (Refer to Body - "Crash Pad Side Garnish Assembly [RH]")

3.	Remove the heater & A/C controller unit from the center fascia after loosening the mounting screws (A).

4.	Disconnect the A/C & heater controller connectors (A).

5.	Remove the heater & A/C controller unit from the center fascia panel after loosening the mounting screws.

6.	Install in the reverse order of removal. • Make sure the connector is connected properly. • Replace any damaged clips.

Heater & A/C Control Unit Components and Components Location

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