DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit: Description
WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
The damper servo (air inlet control) sends pulse signals to inform the air conditioning amplifier of the damper position. The air conditioning amplifier activates the motor (normal, reverse) based on the signals to move the air inlet damper to any position, which controls the intake air settings (FRESH, FRESH/RECIRCULATION, and RECIRCULATION). 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 DTC can be output when either a damper link or the damper is mechanically locked.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1442/42 | Air inlet damper position sensor value does not change even if air conditioning amplifier operates air inlet control servo motor |
|