DTC B1443: Air Outlet Damper Control Servo Motor Circuit [08/2020 - ]: Description
WARNING: This page is about a different variant/trim than selected.
The No. 3 air conditioning radiator damper servo sub-assembly (driver side 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 No. 3 air conditioning radiator damper servo sub-assembly (driver side mode) to the appropriate position, which controls the 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 Diagnosis Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1443 | Air Outlet Damper Control Servo Motor Circuit |
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Memorized |
DTC DIAGNOSIS CONDITION COMBINATION TABLE
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | During No. 3 air conditioning radiator damper servo sub-assembly (driver side mode) operation | ◦ | ◦ |
| Malfunction Status | The damper servo operation request signal is output but the position information of the servo does not change | ◦ | - |
| The damper servo operation request signal is output but the position information of the servo is malfunctioning | - | ◦ | |
| Detection Time | Continuously for 30 seconds or more | Continuously for 30 seconds or more | |
| Trip Count | 1 trip | 1 trip | |
HINT:
If the conditions match either of these patterns, a DTC will be output.