Hyundai Palisade (LX2): Controller / Heater & A/C Control Unit (DATC)

Hyundai Palisade (LX2) 2020-2025 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.

    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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