B1443

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

DESCRIPTION

The mode damper servo sends pulse signals to inform the air conditioning amplifier of the damper position. The air conditioning amplifier activates the motor (normal, reverse) based on the signals to move the air outlet 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 Techstream to the DLC3.

(b) Turn the ignition switch on (IG) and turn Techstream on.

(c) Operate the MODE switch.

(d) Select the item below in the Data List, and read the display on 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.

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.

(b) Check for DTCs.

Result:





B -- END

A -- REPLACE AIR CONDITIONING HARNESS