The Full Automatic
Temperature Control (F.A.T.C) module self test feature will detect
electrical malfunctions and provide error code for system components with
suspected failures.


HOW TO READ SELF-DIAGNOSTIC CODE
1. |
After the display panel flickers three times
every 0.5 second, the corresponding error code flickers on the setup
temperature display panel every 0.5 second and will show two
figures. |
2. |
If error code is more than two, each code
flicker 2 times in sequence.

|
FAULT CODE DISPLAY
1. |
Normal

|
2. |
One error code

|
3. |
More error codes than two

|
4. |
Checking each error code

|
DTC CHART
If
malfunction code is displayed during the DTC check, check the
circuit listed for that code in the table
below.
|
DTC code
|
Detection item
|
Trouble area
|
00
|
Normal
|
-
|
11
|
Open INCAR Sensor
circuit
|
•
|
Harness or connector between incar
sensor and A/C control
assembly |
|
12
|
Shorted INCAR
Sensor circuit
|
13
|
Open Ambient
sensor circuit
|
•
|
Harness or connector between ambient
sensor and A/C control
assembly |
|
14
|
Shorted Ambient
sensor circuit
|
15
|
Open water temp.
sensor
|
•
|
Harness or connector between water temp.
sensor and A/C control
assembly |
|
16
|
Shorted water
temp. sensor
|
17
|
Open
thermistor
|
•
|
Harness or connector between evap.
sensor and A/C control
assembly |
|
18
|
Shorted
thermistor
|
19
|
Open or shorted
temp. door potentiometer
|
•
|
Harness or connector between temp. door
potentiometer and A/C control
assembly | |
20
|
Defective temp.
door potentiometer
|
•
|
Temp. door
potentiometer | |
21
|
Open or shorted
mode door potentiometer
|
•
|
Harness or connector between mode door
potentiometer and A/C control
assembly | |
22
|
Defective mode
door potentiometer
|
•
|
Mode door
potentiometer | |
FAIL SAFE FUNCTION
No.
|
Item
|
Failure
|
FAIL SAFE
Function
|
1
|
IN-CAR
temperature sensor
|
Open/Short
|
25°C alternate
value control
|
2
|
Ambient
temperature sensor
|
Open/Short
|
20°C alternate
value control
|
3
|
Thermistor
sensor
|
Open/Short
|
-2°C alternate
value control
|
4
|
Water temperature
sensor
|
Open/Short
|
-20°C
alternate value control
|
5
|
Temperature door
potentiometer
|
Open/Short setup
temperature
|
For 17°C to
24.5°C, set to maximum cooling position. For 25°C to 32°C, set to maximum heating
position.
|
6
|
Mode door
potentimeter
|
Open/Short setup
mode
|
Vent mode, at
vent mode Def mode, at except vent
mode
|