Hyundai Palisade: Controller / Heater & A/C Control Unit (DATC)

Hyundai Palisade (LX2) 2020-2024 Service Manual / Heating,Ventilation And Air Conditioning / Controller / Heater & A/C Control Unit (DATC)

Components and components location
Component

Hyundai Palisade. Components and components location

Connector Pin Function
Connector
PIN No
Pin Function
Connector
PIN No
Pin Function
A
1
Battery
A
21
IGN2
2
ISG B+
22
IGN1
3
ILL+ (TAIL)
23
Blower Motor (+)
4
Sensor Ground REF (+5V)
24
Photo Sensor (-)_LEFT
5
Mode Control Actuator Feedback
25
Photo Sensor (-)_RIGHT
6
Temperature Actuator Feedback - Driver
26
Incar Sensor (+)
7
Intake Actuator Feedback
27
Incar Motor (-)
8
Evaporator Temperature Sensor (+)
28
PTC Relay 3
9
Ambient Temperature Sensor (+)
29
PTC Relay 3
10
Mode Control Actuator (Vent)
30
PTC On Signal
11
Mode Control Actuator (Defrost)
31
Detent out (-)
12
Temperature Control Actuator (Cool) - Driver
32
K - Line
13
Temperature Control Actuator (Warm) - Driver
33
P_CAN High
14
Intake Actuator (Fresh Air)
34
P_CAN Low
15
Intake Actuator (Recirculated Air)
35
Mosfet (DRAIN F/B)
16
HTD (Rear Defrost)
36
Mosfet (GATE)
17
Rear Defogging Swich
37
ECV +
18
Clean Signal
38
ECV -
19
Ionizer Diagnosis
39
Sensor Ground
20
ILL - (RHEO)
40
Ground

Connector
PIN No
Pin Function
Connector
PIN No
Pin Function
B
1
Temperature Control Actuator Feedback - Passenger
B
9
-
2
Temperature Control Actuator (Cool) - Passenger
10
-
3
Temperature Control Actuator (Warm) - Passenger
11
-
4
Defogging Actuator Feedback
12
Defogging Sensor TEMP
5
Defogging Actuator (Open)
13
Defogging Sensor SCK
6
Defogging Actuator (Close)
14
Defogging Sensor Data
7
-
15
-
8
Seat Signal PWM - Driver
16
Ground

Repair procedures
Self Diagnosis
1.
Self-diagnosis process.

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
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.

Hyundai Palisade. Repair procedures

(2)
Continuance operation : DTC code.

Hyundai Palisade. Repair procedures

(3)
STEP operation.
A. Nomal or one fault code is same as a continuance operation.
B. DTC code.

Hyundai Palisade. Repair procedures

3.
Display
Fail description
Remarks
0
Normal

11
Interior Temperature Sensor Disconnection (OPEN, INCAR F/B Voltage ≥ 4.9V)

12
Interior Temperature Sensor Short Circuit (SHORT, INCAR F/B Voltage ≤ 0.1V)

13
External Temperature Sensor Disconnection (OPEN , AMBIENT F/B Voltage ≥ 4.9V)

14
External Temperature Sensor Short Circuit (SHORT, AMBIENT F/B Voltage ≤ 0.1V)

17
Evaporator Temperature Sensor Disconnection (OPEN, EVAP F/B Voltage ≥ 4.9V)

18
Evaporator Temperature Sensor Short Circuit (SHORT, EVAP F/B Voltage ≤ 0.1V)

19
Driver Seat Temperature Control Actuator Feedback Disconnection/Short Circuit
(OPEN/SHORT)
SHORT Range [TEMP F/B Voltage ≤ 0.1V]
OPEN Range [TEMP F/B Voltage ≥ 4.9V]

20
Driver Seat Temperature Control Actuator Motor Constraint
(Note that if both the target and constraint ranges fall within the MAX
COOL range [0.1V < TEMP FB voltage ≤ 0.5V] and MAX WARM range
[4.5V ≤ TEMP FB voltage < 4.9V], the error code 20 is not displayed because
there is no longer any constraint. This will prevent MAX WARM
and MAX COOL displaying the code 20 due to error margins of the Actuator
and FATC.)
If the actuator cannot reach the desired control position in 10 seconds, then it is deemed constrained
21
Driver Seat Mode Actuator Feedback Disconnection/Short Circuit
SHORT Range [DR MODE F/B Voltage ≤ 0.1V]
OPEN Range [DR MODE F/B Voltage ≥ 4.9V]

22
Driver Seat Mode Actuator Motor Constraint
(Note that if both the target and constraint ranges fall within the VENT
range [0.1V < DR MODE FB voltage ≤ 0.5V] and DEF range [4.5V ≤ DR
MODE FB voltage < 4.9V], the error code 22 is not displayed because
there is no longer any constraint. This will prevent VENT and DEF displaying
the code 22 due to error margins of the Actuator and FATC.)
If the actuator cannot reach the desired control position in 10 seconds, then it is deemed constrained
25
Internal/External Air Actuator Position Sensor Disconnection/Short Circuit
SHORT Range [INTAKE F/B Voltage ≤ 0.1V]
OPEN Range [INTAKE F/B Voltage ≥ 4.9V]

26
Internal/External Air Actuator Motor Constraint
(Note that if both the target and constraint ranges fall within the FRE range
[0.1V < INTAKE FB voltage ≤ 0.5V] REC range [4.5V ≤ INTAKE
FB voltage < 4.9V], the error code 26 is not displayed because there is
no longer any constraint. This will prevent FRE and REC displaying the
code 26 due to error margins of the Actuator and FATC.)

32
Passenger Seat Temperature Control Actuator Feedback Disconnection/Short Circuit
(OPEN/SHORT)
SHORT Range [TEMP F/B Voltage ≤ 0.1V]
OPEN Range [TEMP F/B Voltage ≥ 4.9V]

33
Passenger Seat Temperature Control Actuator Motor Constraint
(Note that if both the target and constraint ranges fall within the MAX
COOL range [0.1V < TEMP FB voltage ≤ 0.5V] and MAX WARM range
[4.5V ≤ TEMP FB voltage < 4.9V], the error code 20 is not displayed because
there is no longer any constraint. This will prevent MAX WARM
and MAX COOL displaying the code 20 due to error margins of the Actuator
and FATC.)
If the actuator cannot reach the desired control position in 10 seconds, then it is deemed constrained
45
APT CAN Signal Error

47
RPM CAN SIGNAL Error

48
Vehicle Speed CAN Signal Error

49
Engine coolant temperature CAN Signal Error


4.
FAIL SAFE
NO
SIGNAL / ITEM
Failure Criteria
Alternative Value in Case of Failure
Remarks
1
AMB SENSOR
OPEN/SHORT
"--" displayed on the screen Alternative Control to 20°C

2
INCAR SENSOR
OPEN/SHORT
Fixed at 25°C

3
EVA SENSOR
OPEN/SHORT
Fixed at -2°C

4
TEMP DOOR POTENTION METER
OPEN/SHORT
For temperature set to 22°C or lower, move to the Cool location and fix it there.
For temperature set to 22.5°C or higher, move to the Warm location and fix it there.

5
MODE DOOR POTENTION METER
OPEN/SHORT
Move to and fix the VENT position if VENT Mode is on
Fix the DEF position movement if it is not in the "VENT Mode"

6
INTAKE DOOR POTENTION METER
OPEN/SHORT
For FRE selection, move to the FRE location and fix it there.
For REC, move to the REC location and fix it there.

7
VS (Vehicle Speed)
FFh or Signal not received
1. Take alternative control based on VS_TCU(From TCU2)
2. When both VS and VS_TCU are FFH or not received, processing the Vehicle speed to FAIL(0 Kph alternative control)

8
VS_TCU (Vehicle speed calculated by TCU)
FFh or Signal not received
1. Take alternative control based on VS_TCU(From TCU2)
2. When both VS and VS_TCU are FFH or not received, processing the Vehicle speed to FAIL(0 Kph alternative control)

9
N (Engine Speed)
Signal not received
Fixed at 650 RPM

10
F_N_ENG (Error-engine speed signal)
01h or Signal not received
Fixed at 650 RPM

11
TPS (Throttle Position Signal)
FFh or Signal not received
Fixed at 0%

12
TEMP_ENG (Engine Coolant Temperature)
FFh or Signal not received
Fixed at 90°C (Include estimated torque calculation)

13
R_TqAcnApvC (Max Torque limitation of A/C Compressor)
FFh or Signal not received
Fixed at 0 Nm

14
R_PAcnC (APT Sensor Output Value)
FFh or Signal not received
Fixed at 0 hPa

15
R_NEngIdlTgC (Engine Idle Target Speed)
FFh or No Signal not received
Use the Replacement Tabel

16
SUNROOF ON/OFF (C_SunRoofOpenState)
Signal not received
Process the signal to C_SunRoofOpenState=0H (SUNROOF Interlocking Logic not working)


Replacement
Hyundai Palisade. Repair procedures   
When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components.
Put on gloves to prevent hand injuries.
Hyundai Palisade. Repair procedures   
Take care not to bend or scratch the trim and panels.
1.
Disconnect the negative (-) battery terminal.
2.
Using a flat-tip screwdriver or remover and remove the console upper cover (A).

Hyundai Palisade. Repair procedures

3.
Press the lock pin and separate the various connectors (A).

Hyundai Palisade. Repair procedures

4.
Loosen the mounting screws and remove the heater & A/C control unit (A).

Hyundai Palisade. Repair procedures

5.
To install, reverse removal procedure.
Hyundai Palisade. Repair procedures   
Replace any damaged clips (or pin-type retainers).
Make sure the connector are connected in properly.

    Controller

    ..

    Heater & A/C Control Unit (Rear)

    Components and components location Component Connector Pin Function Connector PIN No Pin Function Connector PIN No Pin Function A 1 Battery A 17 IGN2 2 ISG B+ 18 IGN1 3 ILL+ (TAIL) 19 Blower Motor (+) 4 Sensor Ground REF (+5V) 20 - 5 Mode Control Actuator Feedback 21 Mosfet (DRAIN F/B) 6 Temperature Actuator Feedback 22 Mosfet (GATE) 7 Mode Control Actuator (Vent) 23 Heater Switch _ LH 8 Mode Control Actuator (Defrost) 24 Indicator (HIGH) _ LH 9 Temperature Control Actuator (Cool) 25 Indicator (MID) _ LH 10 Temperature Control Actuator (Warm) 26 Indicator (LOW) _ LH 11 Detent out (-) 27 Heater Switch _ RH 12 K - Line 28 Indicator (HIGH) _ RH 13 LIN Left 29 Indicator (MID) _ RH 14 Lin Right 30 Indicator (LOW) _ RH 15 - 31 Sensor Ground 16 ILL - (RHEO) 32 Ground Repair procedures Replacement    • When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components...

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    Categories

    Battery replacement

    Hyundai Palisade. Battery replacement

    If the remote key is not working properly, try replacing the battery with a new one.

    Battery Type: CR2032

    To replace the battery:

    read more


     
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