B1446

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side)
B1446/46 - Air Mix Damper Control Servo Motor Circuit (Driver Side)

DESCRIPTION

The front air mix damper servo motor (for driver side) 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 air mix damper (for driver side) to any position. As a result, the amount of air that has passed through the evaporator and is passing through the heater core is adjusted, and the temperature of the air blowing toward the driver side 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 (FRONT AIR MIX 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 FRONT AIR MIX DAMPER SERVO MOTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

2. REPLACE FRONT AIR MIX DAMPER SERVO MOTOR

(a) Replace the front air mix damper servo motor (for driver side) 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 B1446 is not output.

NG -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY Disassembly

OK -- REPLACE FRONT AIR MIX DAMPER SERVO MOTOR Disassembly