The temperature control actuator is located at the heater unit. The actuator consists of a motor and feedback potentiometer that is used by the A/C ECU to control air temperature and to monitor actuator operation.
Airconditioner Control Module sets DTC B1204 if the Feed Back signal of Passenger Air mix actuator(Temperature actuator) has been detected open or below 0.1V for 100ms.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check |
•
Poor connection of connected part
•
Open in signal circuit (Feedback circuit), Power circuit or Ground Circuit
•
Faulty passenger air mix actuator
•
Faulty A/C control unit |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Feedback signal has been detected open or below 0.1V for 100ms | |
Failsafe |
•
setting temperature : 24.5℃(76.1℉) fix at max. cooling position
•
setting temperature : 25℃(77℉) fix at max. heating position |
Door position | Voltage |
Max. cool | 0.4 V±0.3V |
Max. warm | 4.6 V±0.3V |
