Hyundai Santa Cruz Owners & Service Manuals

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

- Terminal Function

Connector Pin Function
Pin NoConnector A
1Battery (+)
2-
3-
4LIN BUS (Climate control)
5-
6-
7-
8-
9IGN2
10ISG B+
11IGN1
12-
13Incar sensor (+)
14-
15Sensor Ground
16Ground

- 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.Self diagnostic code

DisplayFail descriptionRemarks
0Normal
11Interior Temperature Sensor Disconnection (OPEN)
12Interior Temperature Sensor Short Circuit (SHORT)
13Ambient Temperature Sensor Disconnection (OPEN)
14Ambient Temperature Sensor Disconnection (SHORT)
17Evaporator Temperature Sensor Disconnection (OPEN)
18Evaporator Temperature Sensor Disconnection (SHORT)
19Driver 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]
20Dr TEMP DOOR POTENTIOMETER LOCKEDIf the actuator cannot reach the desired control position in 20 seconds, then it is deemed to be locked.
21MODE DOOR POTENTIOMETER Disconnection/Short Circuit (OPEN/SHORT)
SHORT Range [DR MODE F/B Voltage ≤ 0.1V]
OPEN Range [DR MODE F/B Voltage ≥ 4.9V]
22MODE DOOR POTENTIOMETER LOCKEDIf the actuator cannot reach the desired control position in 20 seconds, then it is deemed to be locked.
24AUTO DEFOG SENSOR (SHORT)ADS specification ONLY 
25INTAKE DOOR POTENTIOMETER Disconnection/Short Circuit (OPEN/SHORT)
SHORT Range [INTAKE F/B Voltage ≤ 0.1V]
OPEN Range [INTAKE F/B Voltage ≥ 4.9V]
26INTAKE DOOR POTENTIOMETER LOCKEDIf the actuator cannot reach the desired control position in 10 seconds, then it is deemed to be locked.
32PASSENGER TEMP DOOR POTENTIOMETER Disconnection/Short Circuit (OPEN/SHORT)
SHORT Range [TEMP F/B Voltage ≤ 0.1V]
OPEN Range [TEMP F/B Voltage ≥ 4.9V]
33PASSENGER TEMP DOOR  POTENTIOMETER LOCKEDIf the actuator cannot reach the desired control position in 20 seconds, then it is deemed to be locked.
43DEFOG DOOR POTENTIOMETER Disconnection/Short Circuit (OPEN/SHORT)ADS specification ONLY
SHORT Range [DEFOG F/B Voltage ≤ 0.1V]
OPEN Range [DEFOG F/B Voltage ≥ 4.9V]
44DEF DOOR POTENTIOMETER LOCKEDIf the actuator cannot reach the desired control position in 10 seconds, then it is deemed to be locked.
ADS specification ONLY
45APT CAN Signal Error
47RPM CAN SIGNAL Error
48Vehicle Speed CAN Signal Error
49Engine coolant temperature CAN Signal Error
71ECV Fault (OPEN)
72Communication error between the LCD module and control unit

4.FAIL SAFE

NOSIGNAL / ITEMFailure CriteriaAlternative Value in Case of Failure
1INCAR SENSORVoltage ≤ 0.1V or Voltage ≥ 4.9VFixed at 22°C
2AMB SENSORVoltage ≤ 0.1V or Voltage ≥ 4.9VFixed at 20°C
3EVA SENSORVoltage ≤ 0.1V or Voltage ≥ 4.9VFixed at -2°C
4TEMPERATURE CONTROL ACTUATORVoltage ≤ 0.1V or Voltage ≥ 4.9VWhen the set temperature is 16.5°C → 22°C :
Fixed to the maximum cooling.
When the set temperature is 22.5°C → 27.5°C : Fixed to the maximum heating.
5MODE CONTROL ACTUATORVoltage ≤ 0.1V or Voltage ≥ 4.9VIn case of vent mode : Vent position is fixed.
Other modes other than the vent :
Defrost position is fixed.
6INTAKE ACTUACORVoltage ≤ 0.1V or Voltage ≥ 4.9VIn case of outdoor ventilation mode :
Outdoor ventilation position is fixed.
In case of indoor ventilation mode :
Indoor ventilation position is fixed.
7AUTO DEFOGGING SENSOR (relative humidity)OPEN / SHORTRelative humidity : 0 %
8Engine coolant temperatureOPEN / SHORT90°C
9ECV FeedbackOPENECV output OFF

- Replacement

1.Disconnect the negative (-) battery terminal.

2.Remove the front monitor.(Refer to Body Electrical System - "Front Monitor")

3.Loosen the mounting screw, remove the heater & A/C control unit (A).

4.Install in the reverse order of removal.

   

• Replace any damaged clips.

• Make sure the connector is connected properly.

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