Air Conditioning System (for Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1443/43: Air Outlet Damper Control Servo Motor Circuit

DTC B1443/43 - Air Outlet Damper Control Servo Motor Circuit

DESCRIPTION

The air outlet control servo motor sends pulse signals to indicate the damper position to the air conditioning amplifier. The air conditioning amplifier activates the motor (normal or reverse) based on these signals to move the mode damper to the appropriate position, which controls the air outlet modes.
HINT: Confirm that there are no mechanical problems because this DTC can be set if either a damper link or the damper is mechanically locked.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream main switch on.
(c) Select the items below in the Data List, and read the value displayed on the Techstream.

Data List / Air Conditioner





OK:
The display is as specified in the normal condition column.
Result:






C -- REPLACE AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
2. REPLACE AIR OUTLET CONTROL SERVO MOTOR
(a) Replace the air outlet control servo motor.
NEXT -- Continue to next step.
3. CHECK DTC OUTPUT
(a) Clear the DTCs.
(b) Check for DTCs.
OK:
DTC B1443/43 is not output.
NG -- REPLACE AIR CONDITIONING HARNESS
OK -- END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE)