DTC B1445/45 Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The damper servo (cool air by-pass) sends pulse signals to inform the A/C amplifier of the damper position The A/C amplifier activates the motor (normal, reverse) based on the signals to move the damper to any position As a result, when the A/C is operating, the temperature of the air blowing toward the passenger's head area is controlled.
The A/C amplifier communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness
HINT.
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1445/45 | Cool air by-pass control servo motor value does not change even if A/C amplifier operates cool air bypass control servo motor |
|