B1445

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1445/45: Passenger Side Cool Air Bypass Damper Control
B1445/45 - Passenger Side Cool Air Bypass Damper Control

DESCRIPTION

The cool air bypass damper servo motor 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 the signals to move the cool air bypass damper to any position. As a result, when the air conditioner is operating, the temperature of the air blowing toward the head area is controlled.

HINT
Confirm that no mechanical problem is present because this trouble code can be stored when either a damper link or damper is mechanically locked.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (COOL AIR BYPASS DAMPER SERVO MOTOR)

(a) Use the Data List to check if the servo motor is functioning properly.

Air Conditioner





OK:

The display is as specified in the normal condition.

NG -- REPLACE COOL AIR BYPASS DAMPER SERVO MOTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

2. REPLACE COOL AIR BYPASS DAMPER SERVO MOTOR

(a) Replace the cool air bypass damper servo motor Disassembly.

HINT
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one.

NEXT -- Continue to next step.

3. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B1445 is not output.

NG -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY Disassembly

OK -- REPLACE COOL AIR BYPASS DAMPER SERVO MOTOR Disassembly