DESCRIPTION
The damper servo sub-assembly (mode damper servo) sends pulse signals to inform the No. 1 air conditioning amplifier assembly of the damper position. The No. 1 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.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1443/43 |
The air outlet damper position does not change when the No. 1 air conditioning amplifier assembly operates the damper servo sub-assembly (mode damper servo). |
|
WIRING DIAGRAM
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (MODE DAMPER SERVO) |
(a) Use the Data List to check if the damper servo sub-assembly (mode damper
servo) is functioning properly (See page ).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Air Outlet Servo Pulse (D) |
Damper servo sub-assembly (mode damper servo) actual pulse / Min.: 0, Max.: 255 |
15 (pulse): FACE 1 15 (pulse): FACE 2 41 (pulse): B/L 65 or 73 (pulse): FOOT 83 or 95 (pulse): F/D 113 (pulse): DEF |
- |
Air Outlet Servo Actu Pulse (D) |
Damper servo sub-assembly (mode damper servo) actual pulse / Min.: 0, Max.: 255 |
15 (pulse): FACE 1 15 (pulse): FACE 2 41 (pulse): B/L 65 or 73 (pulse): FOOT 83 or 95 (pulse): F/D 113 (pulse): DEF |
- |
OK:
The display is as specified in the normal condition column.
Result
Result |
Proceed to |
---|---|
OK (When troubleshooting according to problem symptoms table) |
A |
OK (When troubleshooting according to the DTC) |
B |
NG |
C |
A | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B | ![]() |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
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 damper servo sub-assembly (mode damper servo) operates (See
page ).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Air Outlet Servo Pulse (D) |
Damper servo sub-assembly (mode damper servo) pulse |
Min.: 0, Max.: 255 |
- |
OK:
Damper servo sub-assembly (mode damper servo) operates normally.
OK | ![]() |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
3. |
REPLACE DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO) |
(a) Replace the damper servo sub-assembly (mode damper servo) (See page
).
HINT:
Since the damper servo sub-assembly (mode damper servo) cannot be inspected while it is removed from the vehicle, replace the damper servo sub-assembly (mode damper servo) with a new or normally functioning one.
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B1443 is not output.
OK | ![]() |
END (DAMPER SERVO SUB-ASSEMBLY [MODE DAMPER SERVO] IS FAULTY) |
|
5. |
REPLACE NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Temporarily replace the No. 1 air conditioning amplifier assembly with a
new or normally functioning one (See page ).
|
6. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC B1443 is not output.
OK | ![]() |
END (NO. 1 AIR CONDITIONING AMPLIFIER ASSEMBLY IS FAULTY) |
NG | ![]() |
REPLACE AIR CONDITIONING HARNESS ASSEMBLY |
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems ne ...
Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound signal from an external
device to the navigation receiver assembly via this circuit.
The sound signal that has been sent is amplified by the stereo component amplifier
assembly, and then ...