Toyota Prius 2010 Repair Manual page 107

DTC B1442/42 Air Inlet Damper Control Servo Motor Circuit
DESCRIPTION
The air inlet control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The
A/C amplifier activates the motor (normal or reverse) based on these signals to move the air inlet mode
selection air inlet control 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 stored when either a damper link or the
damper is mechanically locked.
DTC No.
Air inlet damper position sensor value does not change even if A/C
B1442/42
amplifier operates air inlet control servo motor
WIRING DIAGRAM
INSPECTION PROCEDURE
2010 Toyota Prius
DTC Detection Condition Trouble Area
Air inlet control servo
motor
Air conditioning
harness
A/C amplifier
Repair Manual