Hyundai Accent: Controller / Heater & A/C Control Unit (FATC)
Hyundai Accent (HC) (2017 - 2022) Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (FATC)
| Connector | Pin NO | Function | Connector | Pin NO | Function |
| A | 1 | Battery (+) | A | 21 | IGN2 |
| 2 | ADS Sensor (PWM) | 22 | IGN1 | ||
| 3 | ILL+ (TAIL) | 23 | HTD (Rear defog indicator) | ||
| 4 | C_CAN High | 24 | PAB off signal | ||
| 5 | C_CAN Low | 25 | PAB IGN1 | ||
| 6 | Defrost actuator (Open) | 26 | Sensor ground REF (+5V) | ||
| 7 | Defrost actuator (Close) | 27 | Detent out (-) | ||
| 8 | Mode control actuator (Vent) | 28 | Ambient Temperature Sensor (+) | ||
| 9 | Mode control actuator (Def) | 29 | Evaporator Temperature Sensor (+) | ||
| 10 | Temperature control actuator (Cool) | 30 | Photo sensor (-) | ||
| 11 | Temperature control actuator (Warm) | 31 | - | ||
| 12 | Intake actuator (Fresh) | 32 | - | ||
| 13 | Intake actuator (Recirculation) | 33 | Hazard signal | ||
| 14 | Mode control actuator (Feedback) | 34 | Rear defog swich | ||
| 15 | Tmperature control actuator (Feedback) | 35 | - | ||
| 16 | Intake actuator (Feedback) | 36 | Blower motor (+) | ||
| 17 | Defrost actuator (Feedback) | 37 | Fet (Drain feedback) | ||
| 18 | ECV+ | 38 | Fet (Gate) | ||
| 19 | ECV- (Ground) | 39 | Sensor ground | ||
| 20 | ILL- (RHEO) | 40 | Ground |
1.Self-diagnosis process.
• When operating the self-diagnostics, the below fault (self-diagnostics code) will blink at 0.5 seconds interval on the temperature display settings (driver's side only) and the remaining symbols are OFF .
2.Fault code display
(1)Continuance operation : DTC code.
(2)Continuance operation : DTC code.
(3)STEP operation.A. Nomal or one fault code is same as a continuance operation. B. DTC code.
3.If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
| Display | Fail description | Note |
| 0 | Normal | |
| 11 | Incar sensor OPEN | |
| 12 | Incar sensor SHORT | |
| 13 | Ambient sensor OPEN | |
| 14 | Ambient sensor SHORT | |
| 17 | Evaporator sensor OPEN | |
| 18 | Evaporator sensor SHORT | |
| 19 | Driver temp door potentionmeter OPEN or SHORT | |
| 20 | Driver temp door potentionmeter Error | |
| 21 | Mode door potentionmeter OPEN or SHORT | |
| 22 | Mode door potentionmeter Error | |
| 23 | Auto defog sensor OPEN | |
| 24 | Auto defog sensor SHORT | |
| 25 | Intake door potentionmeter OPEN or SHORT | |
| 26 | Intake door potentionmeter Error | |
| 43 | Defog door potentiometer OPEN or SHORT | |
| 44 | Defog door potentiometer Error | |
| 45 | APT CAN Signal Error | |
| 47 | RPM CAN Signal Error | |
| 48 | Vehicle speed CAN Signal Error | |
| 49 | Engine coolant temprature CAN Signal Error | |
| 50 | Cluster ionizer fault | |
| 71 | ECV Fault (OPEN) | |
| 85 | Blower motor Error | North America Type ONLY |
4.Fail safe
| NO | Item | Fault | Fail Safe |
| 1 | Amblent sensor | Open or Short | Control with the value of 20°C(67°F) |
| 2 | Incar sensor | Open or Short | Control with the value of 25°C(77.0°F) |
| 3 | Evaporator sensor | Open or Short | Control with the value of -2°C(28.4°F) |
| 4 | Temperature control actuator | Open or Short | If temperature setting 17°C(62.6°F) - 24.5°C(76.1°F), fix at maximum cooling position. If temperature setting 25°C(77°F) - 32°C(89.6°F), fix at maximum heating position. |
| 5 | Mode control actuator | Open or Short | Fix vent position, while selecting vent mode. Fix recirculation position, while selecting recirculation mode. |
| 6 | Intake control actuator | Open or Short | Fix fresh position, while selecting fresh mode. Fix recirculation position, while selecting recirculation mode. |
| 7 | Defogging door potentiometer | Open or Short | In the VENT, Bi-Level mode, DEF Door Potention Meter is fixed in CLOSE position. In the mode other VENT, Bi-Level mode, DEF Door Potention Meter is fixed in OPEN position. |
| 8 | Auto defogging sensor | Open or Short | Control with the value of 0% |
| 9 | ECV | Open | CF_Fatc_EcvFlt = 01H (fault) ECV OFF, A/C Output OFF, 0Nm |
| 10 | VS (Vehicle Speed) | FFh or NO reception | VS-TCU (From TCU2) |
| 11 | VS TCU (Vehicle Speed Calculated by TCU) | FFh or NO reception | VS-TCU (From TCU2) |
| 12 | N (Engine speed) | NO reception | Control with the value of 650rpm |
| 13 | F_N_ENG | 0.1h or NO reception | Control with the value of 650rpm |
| 14 | TPS (Throttle position signal) | FFh or NO reception | Control with the value of 0% |
| 15 | TEMP_ENG | FFh or NO reception | Control with the value of 25°C(194.0°F) |
| 16 | R_TqAcnApvC | FFh or NO reception | Control with the value of 0Nm |
| 17 | R _ PAcnC (APT Sensor Output Value) | FFh or NO reception | Control with the value of 0 hPa (ECV OFF) |
| 18 | RLY-AC (Activation of air conditioner compressor relay) | NO reception | Control with the value of 0 hPa (ECV OFF) |
| 19 | R _ NEngIdlTgC (Engine Idle Target Speed) | FFh or NO reception | Control with the value of 0 hPa (ECV OFF) |
| 20 | SOAK_TIME (Engine Soaking Time) | NO reception | Control with the value of IGN off Time |
| 21 | SOAK_TIME_ERROR (Soak Time Error) | 0.1h or NO reception | Control with the value of IGN off Time |
| 22 | Sunroof ON/OFF (CF_SunRoofOpenstate) | CAN signal | CF_SunRoofOpenState=OH |
1.Disconnect the negative (-) battery terminal.
2.Remove the glove box upper cover housing.(Refer to Body - "Glove Box Upper Cover Housing")
3.Remove the audio unit.(Refer to Body Electrical System - "Audio Unit")
4.After loosening the mounting screws, remove the A/C & heater controller unit (A).
5.Disconnect the A/C & heater controller connector (A) and hose (B).
6.To install, reverse the removal procedure.
Other information:
Hyundai Accent (HC) (2017 - 2022) Service Manual: Specifications
- Specification Air Conditioner itemSpecification CompressorType6VSe12 Oil type & CapacityFD46XG (IDEMITSU) 110 ± 10cc (3.72 ± 0.34oz.) Displacement126 cc / rev Pulley type6PK - TYPE Expansion valveTypeBlock type RefrigerantTypeR - 1234yf Capacity480 ± 25 g (16.9 ± 0.88 oz.) Blower Unit ItemSpecification Fresh and recirculationOperating methodActuator BlowerTypeSirocco pan Speed stepAuto + 8 speed (Automatic), 7 speed (Manual) Speed controlPWM (Automatic, Manual) Air filterTypeParticle filter Heater and Evaporator Unit ItemSpecification HeaterTypeFin & Tube type TypeTube - Fin 1Way Mode operating methodCable, Actuator Temperature operating methodCable, Actuator EvaporatorTemperature control typeEvaporator temperature sensor Blower singularA/C Output OFF TemperatureA/C Output ON Temperature Manual control1 - 3 speed1.Hyundai Accent (HC) (2017 - 2022) Service Manual: Cylinder Block
- Disassembly • Use fender covers to avoid damaging painted surfaces. • To avoid damage, unplug the wiring connectors carefully while holding the connector portion. • Mark all wiring connector and hoses to avoid misconnection. • To release the fuel system pressure before removing the engine assembly, start the engine without fuel pump relay.
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