Kia Forte: Heating, Ventilation and Air Conditioning / Heater & A/C Control Unit (DATC)

Kia Forte 2019-2020 (BD) Service Manual / Heating, Ventilation and Air Conditioning / Heater & A/C Control Unit (DATC)

Components and components location
Components

[Connector A]

Pin NO
Function
Pin NO
Function
1
Battery (+)
17
IGN2
2
ISG B+
18
IGN1
3
ILL+ (TAIL)
19
Blower motor (+)
4
Sensor ground REF (+5V)
20
HTD (Rear defog indicator)
5
Mode control actuator (Feedback)
21
Rear defog switch
6
Driver's temperature control actuator (Feedback)
22
Photo sensor (-)_LH
7
Intake actuator (Feedback)
23
Photo sensor (-)_RH
8
EVAP sensor (+)
24
Detent 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's temperature control actuator (Cool)
28
FET (Gate)
13
Driver's temperature control actuator (Warm)
29
ECV +
14
Intake actuator (Recirculation)
30
ECV - (Ground)
15
Intake actuator (Feedback)
31
Sensor ground
16
ILL- (RHEO)
32
Ground

[Connector B]

Pin NO
Function
Pin NO
Function
1
Passenger's temperature control actuator (Feedback)
13
PAB On signal
2
Passenger's temperature control actuator (Cool)
14
PAB IGN1
3
Passenger's temperature control actuator (Warm)
15
PAB Off signal
4
Defogging actuator (Feedback)
16
Auto defogging sensor signal
5
Defogging actuator (On)
17
Rear SBR (LH)
6
Defogging actuator (Off)
18
SBR
7
-
19
Rear SBR (Center)
8
-
20
-
9
-
21
-
10
-
22
-
11
Blower relay
23
Rear SBR (RH)
12
Blower PWM
24
Ground

Repair procedures
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.

Display
Fail description
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
32
Passenger temp door potensionmeter OPEN or SHORT
33
Passenger temp door potention meter Error
45
APT CAN Signal Error
47
RPM CAN Signal Error
48
Vehicle speed CAN Signal Error
49
Engine coolant temprature CAN Signal Error
71
ECV Fault (OPEN)

4.

Fail safe

No
Item
Fault
Fail Safe
1
Incar sensor
Open or Short
Control with the value of 25°C(77.0°F)
2
Amblent sensor
Open or Short
Control with the value of 20°C(67°F)
3
Evaporator sensor
Open or Short
Control with the value of -2°C(28.4°F)
4
Mode door potentiometer
Open or Short
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
5
Temperature door potentiometer (MTC)
Open or Short
If temperature setting 1 - 7 step, fix at maximum cooling position.
If temperature setting 8 - 15 step, fix at maximum heating position.
6
Temperature door potentiometer (DATC)
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.
7
Intake door potentiometer
Open or Short
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
8
Engine RPM
FFh or NO reception
A/C OFF (Control with the value of 650 rpm)
9
Vehicle speed
FFh or NO reception
A/C OFF
10
Engine coolant temperature
FFh or NO reception
Control with the value of - 2°C(28.4°F)
11
APS
FFh or NO reception
Control with the value of 5%
12
R-TQACNAPVC
(Max Torque limitation of A/C Compressor)
FFh or NO reception
A/C OFF (Control with the value of 0 Nm)
13
R-PACNC
(APT Sensor Output Value)
FFh or NO reception
A/C OFF (Control with the value of 0 Nm)
14
RLY-AC
(Activation of air conditioner compressor relay)
FFh or NO reception
FFh

Replacement
1.

Disconnect the negative (-) battery terminal.

2.

Remove the crash pad center garnish.

(Refer to Body - "Crash Pad Center Garnish Assembly")

3.

Remove the center facia vent (A).

4.

Disconnect the center facia vent connector (A).

5.

After loosening the mounting screws, remove the A/C & heater controller unit (A).

6.

Disconnect the heater controller assembly hose (A).

7.

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

8.

To install, reverse the removal procedure.

  

Make sure the connector are connected in properly.

Replace any damaged clips.

Intake Actuator
Description and operation Description The intake actuator is located at the blower unit. It regulates the intake door by a signal from the control unit. Pressing the intake selection s ...

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