2005 SSANGYONG RODIUS air condition

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RODIUS 2005.07
6810-20
AIR CONDITIONING SYSTEM
2) Power Transistor
The power transistor controls the fan speed. It controls the blower motor operating speed
without stages by changing the current value to the base of power transistor when receiving the
fan control signal from FATC.
Front air conditioner power transistor
Rear air conditioner power transistor
(1) Inspection
If the power transistor defect code (DTC 6) is appeared, check as below.
▶
Turn the ignition switch to ON position.
Measure the voltage between terminals while changing the fan speed from stage 1 to stage
6
The specified voltage value in each stage:
1.
2.
3.
If the voltage is out of specified value, check the circuit for open. If the circuit is in normal
condition, replace the power transistor.
4.

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AIR CONDITIONING SYSTEM
RODIUS 2005.07
6810-20
3) Mode Door Actuator
The mode door actuator is an actuator that closes, opens and adjusts the mode door for VENT,
FLOOR and DEF mode to change the air flow directions according to FATC controller. Unde
r
the FATC controller AUTO mode, it stays on DEF mode until the engine coolant temperature
reaches at normal operating level and the mode is changed as below when the MODE switch is
pressed.

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RODIUS 2005.07
6810-20
AIR CONDITIONING SYSTEM
(1) Inspection
If the intake door mode on FATC is different from the actual intake door mode,
check as below. ▶
Turn the ignition switch to ON position.
Measure the voltage between each terminal (P1 through P5)and positive (+) terminal in
respective mode.
(If the voltage is changed from 0 V to 12 V after selecting the mode, it is normal.)
If the voltage value is out of the specified value, check the related circuits for open.
If the circuits are in normal condition, replace the FATC.
If the voltage is within the specified value, replace the mode door actuator assembly.
Connect the positive (+) and negative (-) cables of temporary power supply to the doo
r
mode actuator. And, connect the negative cable to each terminal (P1 through P5) to check
its operation.
(If it operates as shown in above figure, it is normal.) 1.
2.
3.
4.
5.
6.
Circuit diagramTerminal arrangement

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AIR CONDITIONING SYSTEM
RODIUS 2005.07
6810-20
4) Air Door Actuator
The air door actuator sets the intake door mode according to the control signals from FATC.

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RODIUS 2005.07
6810-20
AIR CONDITIONING SYSTEM
(1) Inspection
Terminal arrangementCircuit diagram
If the intake door mode on FATC is different from the actual intake door mode, check
as below. ▶
Turn the ignition switch to ON position.
Measure the voltage between terminal P1 and P2 (approx. 12 V) and terminal a and b
(approx. 5V).
If the voltage value is out of the specified value, check the related circuits for open.
If the circuits are in normal condition, replace the air door actuator assembly.
If the voltage is within the specified value, replace the mode door actuator assembly.
Connect the positive (+) and negative (-) cables of temporary power supply to the air doo
r
actuator. And, connect the cable to each terminal (P1 and P2) in turn to check the moto
r
operation and terminal output. 1.
2.
3.
4.
5.
6.
Air source Mode Bc resistance
Fresh air P1 (-), P2 (+)below 300 Ω
Recirculation P1 (+), P2 (-)over 2.4 kΩ

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AIR CONDITIONING SYSTEM
RODIUS 2005.07
6810-20
5) Air Mix Door Actuator
The air mix door actuator controls the discharging air temperature properly by closing/opening
the damper according to the control signals from FATC.

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RODIUS 2005.07
6810-20
AIR CONDITIONING SYSTEM
(1) Inspection
Circuit diagram
Terminal arrangement
If the air mix door defect error is indicated, check as below. ▶
Turn the ignition switch to ON position.
Measure the voltage between terminal P1 and P2 (approx. 12 V) and terminal a and b
(approx. 5V).
If the voltage value is out of the specified value, check the related circuits for open.
If the circuits are in normal condition, replace the air mix door actuator assembly.
Connect the positive (+) and negative (-) cables of temporary power supply to the air mix
door actuator. And, connect the cable to each terminal (P1 and P2) in turn to check the
motor operation and terminal output. 1.
2.
3.
4.
5.

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AIR CONDITIONING SYSTEM
RODIUS 2005.07
6810-20
6) Thermo AMP
The thermo AMP outputs the compressor ON or OFF signal to ECU to prevent evaporator from
freezing. The sensing part of the thermistor is the evaporator fin contact type.
Remove the thermo AMP and measure the voltage between terminal No. 1 and 2 on the
connector.
Check whether the output voltages (ON: approx. 12 V, off: 0 V).
If the voltage value is out of the specified value, replace the thermo AMP. If the circuit is in
normal condition, check as below.
Turn the ignition switch to ON position and turn on the air conditioner by pressing the
A/C
button. And measure the voltage between terminal A12 and A11 on the FATC controlle
r
connector. (standard: approx. 12 V)
If the voltage value cannot be measured, check the circuit for open. If the measured value is
within the specified range, replace the FATC controller.
1.
2.
3.
4.
5. If the air conditioner does not turn on, check as below.
▶