DESCRIPTION
The No. 1 air conditioning radiator damper servo sub-assembly (air outlet) sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal, reverse) based on the signals to move the No. 1 air conditioning radiator damper servo sub-assembly (air outlet) to any position, which controls the air outlet switching.
The air conditioning amplifier assembly communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness assembly.
Tech Tips
Confirm that no mechanical problem is present because this DTC can be output when either a damper link or the damper is mechanically locked.
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
B1443/43 | Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (air outlet) |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
READ VALUE USING GTS
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Operate the MODE switch.
Enter the following menus: Body Electrical / Air Conditioner / Data List.
Check the value(s) by referring to the table below.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Air Outlet Servo Actu Pulse(D) | No. 1 air conditioning radiator damper servo sub-assembly (air outlet) actual pulse / Min.: 0, Max.: 255 |
FACE: 8 (pulse) B/L: 30 (pulse) FOOT (manual mode): 67 (pulse) FOOT (automatic mode): 60, 67, 74 (pulse) FOOT/DEF: 80 (pulse) DEF: 97 (pulse) |
- |
OK |
---|
The display is as specified in the Normal Condition column. |
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
C |
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here |
A |
PERFORM ACTIVE TEST USING GTS
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Active Test.
Check the operation by referring to the table below.
Tester Display | Test Part | Control Range | Diagnostic Note |
---|---|---|---|
Air Outlet Servo Pulse (D) | No. 1 air conditioning radiator damper servo sub-assembly (air outlet) pulse | Min.: 0, Max.: 255 | Operates between 8 and 97 pulses |
OK |
---|
Air flow position changes in accordance with each control range. |
NG |
REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (AIR OUTLET) Click here |
OK |
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here
REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (AIR OUTLET)
Replace the No. 1 air conditioning radiator damper servo sub-assembly (air outlet) Click here.
Tech Tips
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or known good one and check that the condition returns to normal.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
END (NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY WAS DEFECTIVE) |
A |
REPLACE AIR CONDITIONING HARNESS ASSEMBLY
Replace the air conditioning harness assembly Click here.
Tech Tips
Since the air conditioning harness assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning harness assembly with a new or known good one and check that the condition returns to normal.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
END (AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE) |
A |
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here