Daewoo Korando. Instruction - page 322
FATC-HAVC 7D-15
TROUBLESHOOTING
Check and Service
Incar sensor is a sensor that detects interior air temperature
and a thermistor that decreases its resistance when temperature
up and increases when temperature down.
1. Check that there are incar sensor fault code (11,12) by
using self-diagnosis function.
2. Disconnect incar sensor 2-pin connector that installed on
inner lower instrument panel cover of driver’s side and
remove the sensor.
3. Check that measured resistance value among incar sensor
terminals is as shown in the right side graph.
Notice
Measure resistance value by soaking the sensor in the ice
water and check changes in resistance values after soaking
it in the very hot water.
4. If resistance value is out of specification, replace the incar
sensor.
5. Install the sensor and turn the ignition switch to ON position
and check that voltage between No. 12A terminal of incar
sensor and body (-) is 5V.
6. Check current between the No. 12B and 12A connector
terminals of the incar sensor and the No. 1 and 5 connector
terminals of the airconditioner control unit and repair the
wire if defective.
12B 12A
Incar sensor connector
¯
0.5LW
Airconditioner control unit connector
V
5
¯
0.5BL
1
7D-16 FATC-HAVC
9
10
Ambient sensor connector
2
¯
0.5W
Airconditioner control unit connector
V
5
¯
0.5BL
Ambient Sensor
Ambient sensor is a sensor that detects ambient temperature
and a thermistor that decreases its resistance when temperature
up and increases when temperature down.
1. Check that there are ambient sensor fault code (13,14) by
using self-diagnosis function.
2. Disconnect ambient sensor 2-pin connector that installed
on front right side of the frame and remove the sensor.
3. Check that measured resistance value among ambient
sensor terminals is as shown in the right side graph.
Notice
Measure resistance value by soaking the sensor in the ice
water and check changes in resistance values after soaking
it in the very hot water.
4. If resistance value is out of specification, replace the ambient
sensor.
5. Install the sensor and turn the ignition switch to ON position
and check that voltage between No. 10 terminal of the
ambient sensor and body (-) is 5V.
6. Check current between the No. 10 and 9 connector terminals
of the ambient sensor and the No. 2 and 5 connector
terminals of the airconditioner control unit and repair the
wire if defective.
FATC-HAVC 7D-17
7b
7a
Water sensor connector
3
¯
0.5RB
Airconditioner control unit connector
V
5
¯
0.5BL
Water Sensor
Water sensor is a thermistor that detects engine coolant
temperature to operate the blower speed to LO when water
temperature is less than 50.
1. Check that there are water sensor fault code (15,16) by
using self-diagnosis function.
3. Check that measured resistance value among water sensor
terminals is as shown in the right side graph.
Notice
Measure resistance value by soaking the sensor in the ice
water and check changes in resistance values after soaking
it in the very hot water.
4. If resistance value is out of specification, replace the water
sensor.
5. Install the sensor and turn the ignition switch to ON position
and check that voltage between No. 7a terminal of the water
sensor and body (-) is 5V.
6. Check current between the No. 7a and 7b connector
terminals of the water sensor and the No. 3 and 5 connector
terminals of the airconditioner control unit and repair the
wire if defective.
2. Disconnect water sensor 2-pin connector that installed on
the heater unit of inner instrument panel and remove the
water sensor.
7D-18 FATC-HAVC
0.5WL
12
-
13b 13a
11
0.5WR
-
Sun load sensor
connector
Airconditioner
control unit
connector
13b 13a
V
Sun load sensor
connector
11
13a
mA
Airconditioner
control unit
connector
0.32
200
400
600
800
(660)
Output current (mA)
(Kcal/m
2
h)
Sun load Sensor
Sun load sensor is a photo diode that detects lights. Resistance
of diode can be measured as current by using multimeter
according to increasing sun loads.
1. Check current on the circuits between the sun load sensor
and the airconditioner control unit.
2. Turn the ignition switch to ON position and check that voltage
between No. 13a terminal of the sun load sensor and vehicle
ground is 5V.
3. Measure current between No. 13a terminal of the sun load
sensor and No. 11 terminal of the control unit and check it is
as shown in the below graph.
4. If current value is out of specification, replace the sun load
sensor.
