DTC B1446/46 Air Mix Damper Control Servo Motor Circuit (Driver Side): Description
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
The air mix damper servo sends pulse signals to indicate the damper position to the air conditioning amplifier. The air conditioning amplifier activates the motor (normal or reverse) based on these signals to move the air mix damper (driver seat) to the appropriate position. This adjusts the amount of air passing through the heater core after passing the evaporator and controls the temperature of the blown air.
HINT:
Confirm that there are no mechanical problems because this DTC can be output when either a damper link or damper is mechanically locked.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. | DTC Detection Conditions | Trouble Areas |
|---|---|---|
| B1446/46 | Air mix damper position does not change even if air conditioning amplifier operates air mix control servo motor |
|