DTC B1449: Air Outlet Damper Control Servo Motor Circuit (Rear) [11/2018 - 02/2019]: Description
WARNING: This page is about a different variant/trim than selected.
The No. 2 air conditioning radiator damper servo sub-assembly (rear mode) sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on these signals to move the air outlet damper to the appropriate position, which controls the rear air outlet switching. The air conditioning amplifier assembly communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1449 | Air Outlet Damper Control Servo Motor Circuit (Rear) |
|
|
Memorized (30 sec. or more)* |
- *: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.
DTC DETECTION CONDITION COMBINATION TABLE
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | No. 2 air conditioning radiator damper servo sub-assembly (rear mode) operating | ◦ | ◦ |
| Malfunction | Air outlet damper servo operation request signals are output but the rear passenger side air outlet damper position sensor value does not change | ◦ | - |
| Air outlet damper servo operation request signals are output but the rear passenger side air outlet damper position sensor value is abnormal | - | ◦ | |
| Detection Time | Continuously for 30 seconds or more | Continuously for 30 seconds or more | |
| Trip Count | 1 trip | 1 trip | |
HINT:
If the conditions of either of these patterns are detected, a DTC will be stored.