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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 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.
Display | Fail description |
00 | Normal |
11 | In-car sensor open |
12 | In-car sensor short |
13 | Ambient sensor open |
14 | Ambient sensor short |
17 | Evaporator sensor open |
18 | Evaporator sensor short |
19 | Temp door potentiometer open/short- Drive |
20 | Temp door potentiometer fault- Drive |
21 | Mode door potentiometer open/short |
22 | Mode door potentiometer fault |
25 | Intake door potentiometer open/short |
26 | Intake door potentiometer fault |
45 | APT CAN Signal Fault |
47 | RPM CAN Signal Fault |
48 | Vehicle speed Signal Fault |
49 | Engine coolant temperature CAN Signal Fault |
50 | Cluster ionizer fault |
71 | ECV fault |
Fail safe
NO. | Item | Fault | Fail Safe |
1 | In-car Sensor | Open or Short | Control with the value of 25°C(77.0°F) |
2 | Ambient temperature sensor | Open or Short | Control with the value of 20°C(67°F) |
3 | Evaporator temperature sensor | Open or Short | Control with the value of -2°C(28.4°F) |
4 | Water temperature sensor | Open or Short | Control with the value of -2°C(28.4°F) |
5 | Temperature control actuator | Open or Short | If temperature setting 17°C-24.5°C, fix at maximum cooling position. If temperature setting 25°C-32°C, fix at maximum heating position. |
6 | Mode control actuator | Open or Short | Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode. |
7 | Intake control actuator | Open or Short | Fix fresh position, while selecting fresh mode. |
Fix recirculation position, while selecting recirculation mode. | |||
9 | ECV | Open | CF_Fatc_EcvFlt = 01H (fault) ECV OFF, A/C Output OFF, Torque 0Nm |
10 | VS (Vehicle Speed) | FFh or NO reception | VS-TCU (From TCU2) |
11 | VS TCU (Vehicle Speed Calculated by TCU) | FFh or NO reception | Control with the value of 0 Kph |
12 | N (Engine Speed) | NO reception | Control with the value of 650 RPM |
13 | F_N_ENG | FFh or NO reception | Control with the value of 650 RPM |
14 | TPS (Throttle Position Signal) | FFh or NO reception | 0% |
15 | Temp _ ENG | FFh or NO reception | Control with the value of - 2 ℃(28.4°F) |
16 | R _ TqAcnApvC (Max Torque Limitation of A/C Compressor) | FFh or NO reception | 0 Nm (ECV OFF) |
17 | R _ PAcnC (APT Sensor Output Value) | FFh or NO reception | 0 hPa (ECV OFF) |
18 | RLY _ AC | NO reception | Comp OFF (ECV OFF) |
Disconnect the negative (-) battery terminal.
Using a screwdriver or remover, remove the center fascia panel (A).
Disconnect the A/C & heater controller connectors (A).
Remove the heater & A/C controller unit (A) from the center fascia panel (B) after loosening the mounting screws.
Install in the reverse order of removal.
Make sure the connector are connected in properly.
Replace any damaged clips.
