SSANGYONG RODIUS 2004.09 Manual page 141

D. ACTIVE INCAR/HUMIDITY SENSOR (AIH SENSOR)
The AIH sensor is installed at the driver side instrument panel undercover. It is a sensor that
detects interior temperature and humidity.
▶Functions
▷Interior temperature sensor
This sensor is a negative temperature coefficient (NTC) thermistor and detects the
interior temperature with air coming from senor hole and then sends the voltage value
according to the changed resistance to FATC controller.
▷Humidity sensor
This sensor detects the interior humidity with humidity cell and then sends the voltage
value according to the changed humidity to FATC controller.
▶Inspection
If the active incar sensor defect code (DTC 1) and the humidity sensor defect code (DTC
10) are set, check as below:
▷[Active incar sensor]
- Remove the integrated AIH sensor and measure the resistance between terminal
No. 5 and 6 on the sensor connector. (standard: approx. 25°C,
- If the measured value is out of the specified range, replace the AIH sensor. If the
measured values are within the specified range, check as below.
- Turn the ignition switch to ON position and measure the voltage to active incar
sensor from the FATC controller connector. (standard: approx. 2 V at 25°C)
- If the voltage value cannot be measured, check the circuit for open. If the measured
value is within the specified range, replace the FATC controller.
▷[Humidity sensor]
- Apply 5 V to terminal No. 1 and 3 on the humidity sensor connector.
- Connect the positive (+) probe of a tester on No. 2 terminal and the negative (-)
probe on No. 3 terminal, and measure the output voltage while the voltage is
applied. (output voltage: approx. 0.8 ~ 3.4 V)
- Check whether the output voltage is changed when blowing into the inlet of the
sensor. If there is a voltage change, the sensor is in normal condition. However, if
the voltage is not changed, replace the humidity sensor.
- In addition, if the output voltage is extremely high or low even in the specified
range, replace the humidity sensor.
E. AIR QUALITY SYSTEM (AQS)
▶Components of AQS
Air Quality System (AQS) changes the air source selection to recirculation mode when
polluted air is detected through AQS sensor. The air source selection returns back to fresh
air intake mode after a specified period or the polluted air is disappeared.
▶AQS and air source selection swit
The AQS switch is integrated with the air source selection switch.
▶AUTO Mode
The air source is not changed when pressing the AQS and air source selection switch in
"AUTO" mode. However, the indicator on the switch turned ON/OFF. In other words,
the air source cannot be changed to recirculation mode in AUTO mode by just pressing
the switch. To change the air source to recirculation mode in AUTO mode, get into Manual
mode first, then press the air source selection switch.
▶Manual Mode
To change the AQS mode to Manual mode from AUTO mode, use the MODE switch or the
fan speed control dial. In Manual mode, the "AUTO"
disappeared. When pressing the AQS and air source selection switch, the mode is
changed in order of AQS LED ON, AQS LED OFF (fresh air), and air source LED ON
2.2 kW)
(recirculation). The figure shows that the mode has been changed to the recirculation
mode from fresh air mode under AQS mode (AQS LED ON) after detecting the polluted
outside air.
▶AQS operation
The AQS operates under air conditioner AUTO mode or when the AQS switch is pressed
under manual mode. It requires preheating time (for seconds) for operation and the
module and sensor are integrated. (However, it operates only when the DEF (defroster)
switch on the air conditioner switch panel is not pressed in.)
Self diagnosis and preheating process during initial operation of A/C controller (AUTO
mode)
- When the air conditioner controller is operated in AUTO mode during its initial
operation, the air source is changed to the recirculation mode and AQS LED comes
on. (This is the self diagnosis and preheating process for AQS.)
- After completing the above process, the AQS LED is turned off and the air source is
automatically changed to the fresh air mode.
If the AQS switch is pressed in, the AQS function works regardless of air conditioner
controller operation.
0-97
6810-30
symbol on the display is
CIRCUIT
RODIUS 2004.09