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Self-diagnosis process
Self-diagnosis process
How to read self-diagnostic code
After the display panel flickers three times every 0.5 second, the corresponding fault code flickers on the setup temperature display panel every 0.5 second and will show two figures. Codes are displayed in numerical format
Fault code | Fail description |
Control unit | |
0 | Normal |
11 | In-car temperature sensor open (High) |
12 | In-car temperature sensor short (Low) |
13 | Ambient temperature sensor open (High) |
14 | Ambient temperature sensor short (Low) |
15 | Water temperature sensor open (High) |
16 | Water temperature sensor short (Low) |
17 | Evaporator temperature sensor open (High) |
18 | Evaporator temperature sensor short (Low) |
19 | Temp door potentiometer open (Low) |
19 | Temp door potentiometer short (High) |
20 | Temp door motor |
21 | Direction door potentiometer open (Low) |
21 | Direction door potentiometer short (High) |
22 | Direction door control motor |
25 | Intake door potentiometer open (High) |
25 | Intake door potentiometer short (Low) |
26 | Intake door motor |
48 | Vehicle speed CAN fault |
49 | Engine coolant temperature CAN fault |
51 | Duct sensor vent open (High) |
52 | Duct sensor vent short (Low) |
53 | Duct sensor floor open (High) |
54 | Duct sensor floor short (Low) |
Fault code display
Continuance operation : DTC code is one.
Continuance operation : DTC code is more two.
STEP operation
Nomal or one fault code is same as a continuance operation.
DTC code os more two.
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Fail safe
In-car temperature sensor: Control with the value of 25°C(77°F)
Ambient temperature sensor: Control with the value of 20°C(67°F)
Evaporator temperature sensor: Control with the value of -2°C(28.4°F)
Water temperature sensor: Control with the value of -2°C(28.4°F)
Temperature control actuator (Air mix potentiometer):
If temperature setting 15°C-22.5°C, fix at maximum cooling position.
If temperature setting 23°C-30°C, fix at maximum heating position.
Mode control actuator (Direction potentiometer):
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
Intake control actuator :
Fix fresh position, while selecting fresh mode.
Fix recirculation position, while selecting recirculation mode.
Disconnect the negative (-) battery terminal.
Using the screwdriver, remove the center fascia panel (A).
Disconnect the heater & A/C control unit connectors (A).
Remove the heater & A/C control unit (A) after loosening the screws.
Install in the reverse order of removal.
