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SsangYong Rexton. Manual - part 638

SSANGYONG Y200

7D-18 AUTOMATIC CONTROL HVAC SYSTEM

NO HOT AIR FROM BLOWER

Check the coolant level.

Is the coolant level within the specified value?
Add coolant as needed.

Is the repair complete?

1. Turn the ignition to ON.
2. Observe the temperature indication screen of the controller.

Does the digit flash?
Observe the blower motor operation.

Is the blower motor functioning at all?

Use the blower push switch to cycle the blower through its different
speeds.
Does the motor function at different speeds?

Run a self diagnosis circuit check.
Does the display indicate a defect code?

Check the airflow of the ducts at each mode.

Is the airflow normal?
Check inside the heater duct for obstructions and repair as needed.

Is the repair complete?
Observe the air mix door motor while changing the temperature setting
from LO to HI and then from HI to LO.
Is the air mix door actuator functioning properly?

Check the coolant hoses for leaks or kinks.
Are the coolant hoses in good condition?

Replace the coolant hoses.

Is the repair complete?
Check the coolant reservoir cap.

Is the coolant tank cap in hood condition?
Replace the coolant reservoir cap.

Is the repair complete?

1. Turn the A/C switch to ON.
2. Set the temperature control to full hot (HI).

3. Set the blower motor speed to full high.
4. Remove the coolant reservoir cap (all segments illuminated on the

display).

5. Start the vehicle and run the engine at idles.

6. Watch for the flow of the coolant when the thermostat opens.
Does the coolant flow normally?

1. Check for

•

faulty thermostat.

•

failed coolant pump impeller.

•

restriction in the cooling system.

2. Make repairs, as needed.

Is the repair complete?

Action

Step

Yes

Go to Step 3

Go to Step 2

System OK

Go to Step 6

Go to Step 4

Go to Step 5

Go to “Blower

Motor Does Not

Run At All”

Go to Step 7

Go to “the

Applicable

Diagnostic

Table”

Go to Step 7

Go to “the

Applicable

Diagnostic

Table”

Go to Step 9

Go to Step 8

Go to Step 10

Go to “the

Applicable

Diagnostic

Table”

Go to Step 12

Go to Step 11

System OK

Go to Step 14

Go to Step 13

System OK

Go to Step 16

Go to Step 15

System OK

AUTOMATIC CONTROL HVAC SYSTEM 7D-19

SSANGYONG Y200

No Hot Air From Blower (Cont’d)

BLOWER MOTOR DOES NOT RUN AT ALL

Check the temperature of the heater inlet and outlet hoses by feel.

Is the heater inlet hose hot and the outlet hose warm?
Back flush or replace the heater core.

Is the repair complete?

Check the vehicle for cold air leaks the

•

Dash.

•

Heater cases.

•

Vents.

Are any leaks found?

Repair any cold air leaks.
Is the repair complete?

Check the coolant temperature sensor using the tests in “DTC Coolant
Temperature Sensor Error.”
Is there a problem indicated in the sensor, the sensor wiring or the
controller?

Repair, or replace the sensor, the wiring, or the controller as required.

Is the repair complete?
Replace the controller.

Is the repair complete?

Action

1. Turn the ignition switch to ON.

2. Observe the temperature indication screen of the controller.
Dose the digit on and off?

Check the fuses.
Are the fuses blown?

Replace the fuse.

Is the repair complete?
1. Turn the ignition switch to ON.

2. Measure the voltage between ground and terminal 87 of blower relay.
Is the voltage within the specified value?

1. Measure the voltage between ground and terminal 86 of blower relay.

Is the voltage within the specified value?
1. Check the circuit between terminal 86 of the blower relay and fuse

SB7 in the I/P fuse block.

2. Repair any problem found in the wiring or terminals at the relay

socket or connectors.

Is the repair complete?

1. Turn the ignition to OFF.

2. Disconnect the wiring connector of the blower motor.
3. Turn the ignition to ON.

4. Measure voltage between the wiring connector of the blower motor

and ground.

Is the voltage within the specified value?

Action

Step

Yes

Step

Yes

Go to Step 18

Go to Step 17

System OK

Go to Step 20

Go to Step 19

System OK

Go to Step 21

Go to Step 22

System OK

Go to “the

Applicable
Diagnostic

Table”

Go to Step 2

Go to Step 3

Go to Step 4

System OK

Go to Step 7

11 - 14 V

Go to Step 5

Go to Step 9

11 - 14 V

Go to Step 6

System OK

Go to Step 11

11 - 14 V

Go to Step 10

SSANGYONG Y200

7D-20 AUTOMATIC CONTROL HVAC SYSTEM

Blower Motor Does Not Run At All (Cont’d)

Repair the faulty circuit between the wiring connector of the blower
relay, wiring, blower motor, connector C203, C107.

Is the repair complete?
Measure voltage between terminal 30 of the blower relay and ground.

Is the voltage within the specified value?

1. Repair the circuit between terminal 86 of the blower relay and fuse

SB7 in the I/P fuse block.

2. Repair the wiring connector of the blower relay, wiring, blower

motor, connector C203, C107.

Is the repair complete?
1. Turn the ignition switch to OFF.

2. Using an ohmmeter, measure the resistance between terminal 85 of

the blower relay and ground.

Does the measured resistance indicate 0

Ω

Repair the faulty circuit between terminal 85 of the blower relay, C104
and ground G101.

Is the repair complete?
Replace the blower motor relay.

Is the repair complete?

Measure the resistance of the blower motor.
Does the measured resistance indicate 0.5

Ω

Replace the blower motor.
Is the repair complete?

Measure the open or short of the circuit between terminal 1 of the
blower connector and terminal 30 of the blower high relay and terminal
6 of the power transistor.

Is there any open or short circuit?
Repair the problem in the circuit.

Is the repair complete?

Measure the resistance of the circuit from terminal 3 of the power
transistor connector and ground.
Does the measured resistance indicate 0

Ω

Replace the controller.
Is the repair complete?

1. Repair the faulty circuit from terminal 3 of the power transistor

connector and terminal 87 of the high blower relay to ground.

2. Repair the faulty in the wiring, connector, C109, C209, C104 or

ground G104.

Is the repair complete?

Action

Step

Yes

System OK

Go to Step 9

11 - 14 V

Go to Step 10

System OK

Go to Step 13

Go to Step 12

System OK

Go to Step 15

Go to Step 16

System OK

Go to Step 17

Go to Step 18

System OK

Go to Step 19

Go to Step 20

System OK

AUTOMATIC CONTROL HVAC SYSTEM 7D-21

SSANGYONG Y200

Step

NO COOL AIR FROM BLOWER

1. Turn the ignition switch to ON.

2. Observe the temperature indication screen of the controller.
Does the digit flash?

Run a self-diagnosis circuit check.

Does the display indicate a defect code?

Observe the blower motor operation.

Is the blower motor functioning at all?

Use the blower push switch to cycle the blower through its different
speeds.

Does the motor function at different speeds?

Check the airflow of the ducts at each mode.
Is the airflow normal?

Check inside the heater duct for obstructions and repair as needed.
Is the repair complete?

Observe the air mix door motor while changing the temperature setting
from LO to HI and then from HI to LO.

Is the air mix door actuator functioning properly?

Perform the checks found in “Insufficient Cooling Diagnosis.”

Is the system operating normally now?

Place the controller in the AUTO mode.
Is smoke taken into the intake port of the inside air sensor?

Replace the intake hose.
Is the repair complete?

Check the each sensor and sensor wiring using the Diagnostic Table.

Is there a problem indicated in the sensor, the sensor wiring or the
controller?
Repair, or replace the sensor, the wiring, or the controller as required.

Is the repair complete?
Replace the controller.

Is the repair complete?

Action

Yes

System OK

Go to Step 12

Go to Step 13

System OK

Go to Step 11

Go to Step 10

System OK

Go to Step 9

Go to Step 8

Go to “the

Applicable

Diagnostic

Table”

System OK

Go to Step 8

Go to Step 6

Go to Step 5

Go to “the

Applicable

Diagnostic

Table”

Go to Step 4

Go to “Blower

Motor Does Not

Run At All”

Go to “the

Applicable
Diagnostic

Table”

Go to Step 4

Go to Step 2

Go to Step 3

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