B1443

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1443/43: Air Outlet Damper Control Servo Motor Circuit

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

DESCRIPTION

The mode damper servo sends pulse signals to inform the air conditioner amplifier of the damper position. The air conditioner amplifier activates the motor (normal, reverse) based on the signals to move the mode damper to any position, which controls the air outlet switching.
HINT:
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or damper is mechanically locked.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Operate the MODE switch.
(e) Select the item below in the Data List, and read the display 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
HINT:
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal.
(a) Check for DTCs.
Result:






B -- END
A -- REPLACE AIR CONDITIONING HARNESS