8.2.7.4 Data Stream List

Serial

Number

Name

Data Range

1

Inside Temperature Sensor

-40°C -80°C

2

Outside Temperature Sensor

-40°C -80°C

3

Evaporator Temperature Sensor

-40°C -80°C

4

Heater Temperature Sensor

-40°C -80°C

5

Ambient and Sun Light Sensor

0-1,250 W

6

Temperature Adjust Motor

0% -100%

7

Air Direction Adjust Motor

0% -100%

8

Inside and Outside Circulation Motor

Inside / Outside

9

Background Light Adjustment

PWM Signal, 0% -100%

10

Compressor Control

On / Off

11

Rear Defrosting Control

On / Off

12

Vehicle Speed Signal

0-255 km/h

13

Blower Voltage

0-16.5 V

14

Battery Voltage

0-18.5 V

8.2.7.5 DTC Code Table

Serial

Number

Content

Possible Reasons

1

Inside temperature sensor circuit open or short to
power supply or ground

1. Inside Temperature Sensor Malfunction

2. Harness Malfunction

3. Control Module Malfunction

2

Outside temperature sensor circuit open or short to
power supply or ground

1. Outside Temperature Sensor Malfunction

2. Harness Malfunction

3. Engine Temperature Abnormal

4. Control Module Malfunction

3

Evaporator temperature sensor circuit open or short to
power supply or ground

1. Evaporator Temperature Sensor Malfunction

2. Evaporator temperature sensor is not installed correctly

3. Harness Malfunction

4. Control Module Malfunction

Heating, Ventilation and A/C System

Automatic Air-conditioning

8-23

Serial

Number

Content

Possible Reasons

4

Heater temperature sensor circuit open or short to
power supply or ground

1. Heater Temperature Sensor Malfunction

2. Heater temperature sensor is not installed correctly

3. Harness Malfunction

4. Control Module Malfunction

5

Ambient and sun light sensor circuit open or short to
power supply or ground

1. Ambient and Sun Light Sensor Malfunction

2. Harness Malfunction

3. Control Module Malfunction

6

Temperature control motor circuit open or short to
power supply or ground

1. Temperature Control Motor Malfunction

2. Throttle Control System Malfunction

3. Harness Malfunction

4. Control Module Malfunction

7

Mode motor circuit open or short to power supply or
ground

1. Mode Motor Malfunction

2. Throttle Control System Malfunction

3. Harness Malfunction

4. Control Module Malfunction

8

Inside and outside circulation motor locked or other
obstruction

1. Inside and Outside Circulation Motor Malfunction

2. Inside and Outside Circulation Air Duct Malfunction

3. Harness Malfunction

4. Control Module Malfunction

9

Blower circuit open or short to power supply or ground,
or speed adjust module abnormal

1. Blower Speed Control Module Malfunction

2. Blower Malfunction

3. Harness Malfunction

4. Control Module Malfunction

10

System voltage is too high or too low

1. Generator Malfunction

2. Control Module Malfunction

8.2.7.6 Air-conditioning Clutch Inoperative

Schematic:

Refer to 

8.2.6.2

 

Air-conditioning System Circuit Schematic

.

Diagnostic Steps:

Step 1

Check the air-conditioning system related DTC code.

(a)

Connect scan tool, read air-conditioning system related to
DTC codes.

8-24

Automatic Air-conditioning

Heating, Ventilation and A/C System

(b)

Repair the fault indicated by the DTC.

(c)

Clear DTC.

Is air-conditioning clutch working properly?

Yes

System normal

No

Step 2

Repair according to the fault symptom table.

(a)

Repair as the following fault symptom table.

Symptoms

Suspected

Faulty

Components

Repair Procedure

Engine Coolant
Temperature Too Low

1. ECT sensor

malfunction.

2. ECT sensor

wiring harness
malfunction.

3. Engine cooling

system work in
the big loop.

4. ECM

malfunction.

1. Repair the ECT

harness.

2. Replace the

ECT.

3. Replace the

thermostat.

4. Repair the

ECM, if
necessary,
replace it.

Air Pressure Switch
Signal Abnormal

1. Pressure

switch
indicates the
air pressure
signal not
comply with
the Standard
Value:.

2. Pressure

switch wiring
harness
malfunction.

3. ECM

malfunction.

1. Repair the

pressure switch
wiring harness.

2. Repair the

pressure switch.

3. Repair the

ECM, if
necessary,
replace it.

Heating, Ventilation and A/C System

Automatic Air-conditioning

8-25

Symptoms

Suspected

Faulty

Components

Repair Procedure

Outside Temperature
Sensor Signal
Abnormal

1. Outside

temperature
sensor
indicates that
the
temperature
below 4°C.

2. Outside

temperature
sensor wiring
harness
malfunction.

3. Air-

conditioning
control module
malfunction.

1. Repair the

outside
temperature
sensor wiring
harness.

2. Repair the

outside
temperature
sensor.

3. Repair the air-

conditioning
control module,
if necessary,
replace it.

Evaporator
Temperature Sensor
Signal Abnormal

1. Evaporator

temperature
sensor
indicates that
the
temperature is
below 2°C
(35.6 ºF).

2. Evaporator

temperature
sensor wiring
harness
malfunction.

3. Air-

conditioning
control module
malfunction.

1. Replace the

evaporator
outside
temperature
sensor wiring
harness.

2. Replace the

evaporator
temperature
sensor.

3. Repair the air-

conditioning
control module,
if necessary,
replace it.

8-26

Automatic Air-conditioning

Heating, Ventilation and A/C System