B1443

HEATING / 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 No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) 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 outlet damper to any position, which controls the air outlet changes.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (MODE DAMPER SERVO)

(a) Use the Data List to check if the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) is functioning properly Scan Tool Testing and Procedures.

Air Conditioner





OK:

The display is as specified in the normal condition column.

Result





C -- PERFORM ACTIVE TEST USING TECHSTREAM (MODE DAMPER SERVO)

B -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. PERFORM ACTIVE TEST USING TECHSTREAM (MODE DAMPER SERVO)

(a) Select the Active Test, use the Techstream to generate a control command, and then check that the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) operates Scan Tool Testing and Procedures.

Air Conditioner





OK:

No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) operates normally.

NG -- REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

3. REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

(a) Replace the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) Disassembly.

HINT
Since the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) cannot be inspected while it is removed from the vehicle, replace the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) with a new or normally functioning one.

NEXT -- Continue to next step.

4. 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 B1443 is not output.

NG -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

OK -- END (NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY [MODE DAMPER SERVO] IS FAULTY)

5. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Temporarily replace the air conditioning amplifier assembly with a new or normally functioning one Removal.

NEXT -- Continue to next step.

6. 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 B1443 is not output.

NG -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY Disassembly

OK -- END (AIR CONDITIONING AMPLIFIER ASSEMBLY IS FAULTY)