Kia Forte BD Quiz
Heating, Ventilation, and Air Conditioning

Dual Automatic Temperature Control (DATC) Unit

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
12steps
~72min
3/5difficulty
0102030405000N·mlb·ft
Tightening torque found on this page
Done 0 of 12

Components and Component Location

Components

[Connector A]

Pin No. Function Pin No. Function
1 Battery (+) 17 IGN2
2 ISG B+ 18 IGN1
3 ILL+ (TAIL) 19 Fan Motor (+)
4 REF Sensor Ground (+5V) 20 HTD (Rear Defogger Indicator)
5 Mode Control Actuator (Feedback) 21 Rear Heater Switch
6 Driver Temperature Control Actuator (Feedback) 22 Photo Sensor (-)_LH
7 Intake Actuator (Feedback) 23 Photo Sensor (-)_RH
8 EVAP Sensor (+) 24 Latch Out (-)
9 AMB Sensor (+) 25 P_CAN High
10 Mode Control Actuator (Vent) 26 P_CAN Low
11 Mode Control Actuator (Def) 27 FET Drain (Feedback)
12 Driver Temperature Control Actuator (Cool) 28 FET (Gate)
13 Driver Temperature Control Actuator (Warm) 29 ECV +
14 Intake Actuator (Recirculation) 30 ECV - (Ground)
15 Intake Actuator (Feedback) 31 Sensor Ground
16 ILL- (REO) 32 Ground

[Connector B]

Pin No. Function Pin No. Function
1 Passenger Temperature Control Actuator (Feedback) 13 PAB by Signal
2 Passenger Temperature Control Actuator (Cool) 14 PAB IGN1
3 Passenger Temperature Control Actuator (Warm) 15 PAB Off Signal
4 Defog Activator (Feedback) 16 Auto Defog Sensor Signal
5 Defog Activator (On) 17 Rear SBR (Left)
6 Defog Activator (Off) 18 SBR
7 - 19 Rear SBR (Center)
8 - 20 -
9 - 21 -
10 - 22 -
11 Fan Relay 23 Rear SBR (Right)
12 PWM Blower 24 Ground

Repair Procedures

Self-Diagnosis

  1. Self-Diagnosis Procedure.

  2. Trouble Code Display

    1. Continuous Operation: DTC.

    2. Continuous Operation: DTC.

    3. STEP operation.

      A. Normal code or a single trouble code is equivalent to continuous operation.

      B. Trouble code.

  3. If trouble codes are displayed during the check, check the causes of the trouble by trouble code.

    Display Description of Malfunction
    0 Normal
    11 Incar sensor OPEN
    12 Incar sensor SHORT
    13 Ambient sensor OPEN
    14 Ambient air sensor SHORT
    17 Evaporator sensor OPEN
    18 Evaporator sensor SHORT
    19 Driver side temperature potentiometer OPEN or SHORT
    20 Driver side potentiometer malfunction
    21 Mode door potentiometer OPEN or SHORT
    22 Mode door potentiometer malfunction
    23 Auto defog sensor OPEN
    24 Auto defog sensor SHORT
    25 Intake door potentiometer OPEN or SHORT
    26 Intake door potentiometer malfunction
    32 Passenger side temperature potentiometer OPEN or SHORT
    33 Passenger side temperature sensor malfunction
    45 APT CAN signal error
    47 RPM CAN signal error
    48 Vehicle speed CAN signal error
    49 Engine coolant temperature CAN signal error
    71 ECV error (OPEN)

  4. Fail-safe

    No Item Fault Fail-safe
    1 Incar sensor Open or short Monitor value 25 °C
    2 Ambient sensor Open or short Monitor value 20 °C
    3 Evaporator sensor Open or short Monitor value -2°C (28.4°F)
    4 Mode door potentiometer Open or short Fix the vent position when selecting the vent mode.
    Fix the defrost position by selecting any mode except the vent mode.
    5 Temperature door potentiometer (MTC) Open or short If the temperature setting is 1 to 7 steps, fix at the maximum cooling position.
    If the temperature setting is 8 to 15 steps, fix at the maximum heating position.
    6 Temperature door potentiometer (DATC) Open or short If the temperature setting is 17 °C - 24 °C, fix the cooling position at maximum.
    If the temperature setting is 25 °C - 32 °C, fix the heating position at maximum.
    7 Intake door potentiometer Open or short Fix the vent position when selecting the vent mode.
    Fix the defrost position by selecting any mode except the vent mode.
    8 Engine Speed FFh or no reception A/C OFF (Control with value 650 rpm)
    9 Vehicle Speed FFh or no reception A/C OFF
    10 Engine Coolant Temperature FFh or no reception Monitor value - 2 °C
    11 APS FFh or no reception Monitor value 5%
    12 R-TQACNAPVC
    (A/C compressor maximum torque limit)    		 FFh or no reception A/C OFF (Control with value 0 N·m)
    13 R-PAKNK
    (APT sensor output value)    		 FFh or no reception A/C OFF (Control with value 0 N·m)
    14 RLY-AC
    (A/C compressor relay activation)    		 FFh or no reception FFh

Replacement

  1. Disconnect the negative (-) battery terminal.

  2. Remove the center airbag garnish.

    (Refer to Body - "Center Airbag Garnish Assembly")

  3. Remove the center ventilator (A).

  4. Disconnect the center ventilator connector (A).

  5. After loosening the mounting screws, remove the heater and air conditioning controller unit (A).

  6. Disconnect the hose from the heater control unit (A).

  7. Disconnect the A/C and heater controller connectors (A).

  8. To install, reverse the removal procedure.

Test yourself

A quick Kia Forte BD quiz: every answer comes with an explanation and a link to the manual page.