Hyundai Accent (HC): 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)

- Components

ConnectorPin NOFunctionConnectorPin NOFunction
A1Battery (+)A21IGN2
2ADS Sensor (PWM)22IGN1
3ILL+ (TAIL)23HTD (Rear defog indicator)
4C_CAN High24PAB off signal
5C_CAN Low25PAB IGN1
6Defrost actuator (Open)26Sensor ground REF (+5V)
7Defrost actuator (Close)27Detent out (-)
8Mode control actuator (Vent)28Ambient Temperature Sensor (+)
9Mode control actuator (Def)29Evaporator Temperature Sensor (+)
10Temperature control actuator (Cool)30Photo sensor (-)
11Temperature control actuator (Warm)31-
12Intake actuator (Fresh)32-
13Intake actuator (Recirculation)33Hazard signal
14Mode control actuator (Feedback)34Rear defog swich
15Tmperature control actuator (Feedback)35-
16Intake actuator (Feedback)36Blower motor (+)
17Defrost actuator (Feedback)37Fet (Drain feedback)
18ECV+38Fet (Gate)
19ECV- (Ground)39Sensor ground
20ILL- (RHEO)40Ground

- Self Diagnosis

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.

DisplayFail descriptionNote
0Normal
11Incar sensor OPEN
12Incar sensor SHORT
13Ambient sensor OPEN
14Ambient sensor SHORT
17Evaporator sensor OPEN
18Evaporator sensor SHORT
19Driver temp door potentionmeter OPEN or SHORT
20Driver temp door potentionmeter Error
21Mode door potentionmeter OPEN or SHORT
22Mode door potentionmeter Error
23Auto defog sensor OPEN
24Auto defog sensor SHORT
25Intake door potentionmeter OPEN or SHORT
26Intake door potentionmeter Error
43Defog door potentiometer OPEN or SHORT
44Defog door potentiometer Error
45APT CAN Signal Error
47RPM CAN Signal Error
48Vehicle speed CAN Signal Error
49Engine coolant temprature CAN Signal Error
50Cluster ionizer fault
71ECV Fault (OPEN)
85Blower motor Error North America Type ONLY

4.Fail safe

NOItemFaultFail Safe
1Amblent sensorOpen or ShortControl with the value of 20°C(67°F)
2Incar sensorOpen or ShortControl with the value of 25°C(77.0°F)
3Evaporator sensorOpen or ShortControl with the value of -2°C(28.4°F)
4Temperature control actuator Open or ShortIf 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.
5Mode control actuator Open or ShortFix vent position, while selecting vent mode.
Fix recirculation position, while selecting recirculation mode.
6Intake control actuator Open or ShortFix fresh position, while selecting fresh mode.
Fix recirculation position, while selecting recirculation mode.
7Defogging door potentiometerOpen or ShortIn 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.
8Auto defogging sensorOpen or ShortControl with the value of 0%
9ECV Open CF_Fatc_EcvFlt = 01H (fault) ECV OFF, A/C Output OFF, 0Nm
10VS (Vehicle Speed) FFh or NO receptionVS-TCU (From TCU2)
11 VS TCU (Vehicle Speed Calculated by TCU) FFh or NO receptionVS-TCU (From TCU2)
12N (Engine speed)NO receptionControl with the value of 650rpm
13F_N_ENG 0.1h or NO reception Control with the value of 650rpm
14TPS (Throttle position signal)FFh or NO receptionControl with the value of 0%
15TEMP_ENGFFh or NO receptionControl with the value of 25°C(194.0°F)
16R_TqAcnApvCFFh or NO receptionControl with the value of 0Nm
17R _ PAcnC (APT Sensor Output Value)FFh or NO receptionControl with the value of 0 hPa (ECV OFF)
18RLY-AC (Activation of air conditioner compressor relay)NO receptionControl with the value of 0 hPa (ECV OFF)
19R _ NEngIdlTgC (Engine Idle Target Speed)FFh or NO receptionControl with the value of 0 hPa (ECV OFF)
20SOAK_TIME (Engine Soaking Time)NO receptionControl with the value of IGN off Time
21SOAK_TIME_ERROR (Soak Time Error)0.1h or NO reception Control with the value of IGN off Time
22Sunroof ON/OFF (CF_SunRoofOpenstate)CAN signalCF_SunRoofOpenState=OH

- Replacement

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.

Heater & A/C Control Unit (Manual)

Advanced Driver Assistance System (ADAS)

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Fluid

- Components Location 1. Intelligent Variable Transmission (IVT)2. Drain plug gasket3. Drain plug4. Intelligent Variable Transmission Fluid (IVTF) level check plug5. IVTF injection plug - Inspection     • Be sure to use the genuine IVTF (SP-IVT1). • When replacing with non-genuine IVTF, bad shift and vibration may occur, causing damage to the IVT.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Description and Operation

- Description of ESP Optimum driving safety now has a name : ESP, the Electronic Stability Program.ESP recognizes critical driving conditions, such as panic reactions in dangerous situations, and stabilizes the vehicle by wheel-individual braking and engine control intervention with no needfor actuating the brake or the gas pedal.ESP adds a further function known as Active Yaw Control (AYC) to the ABS, TCS, EBD and ESP functions.

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