DESCRIPTION
The air mix damper servo (for driver side COOL) 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 mix damper (for driver side COOL) to any position. As a result the amount of air that has passed through the evaporator and is now passing through the heater core is adjusted, and the temperature of the air blowing toward the driver side is controlled.
Tech Tips
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or damper is mechanically locked.
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
B1453/53 | Air mix damper position sensor value does not change even if air conditioning amplifier operates air mix servo motor |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
CHECK FOR DTC
Clear the DTCs Click here.
Check for DTCs Click here.
Result | Proceed to |
---|---|
DTC B1453/53 is not output | A |
DTC B1453/53 is output | B |
DTC B1453/53 and B1497/97 are output | C |
B |
READ VALUE USING INTELLIGENT TESTER (AIR MIX SERVO MOTOR TARGET PULSE (for Driver Side COOL)) Click here |
C |
GO TO DTC B1497/97 Click here |
A |
USE SIMULATION METHOD TO CHECK Click here
READ VALUE USING INTELLIGENT TESTER (AIR MIX SERVO MOTOR TARGET PULSE (for Driver Side COOL))
Use the Data List to check if the servo motor is functioning properly.
Tester Display | Measurement Item / Range | Normal Condition | Diagnostic Note |
---|---|---|---|
COOL A/M Servo Targ Pls(D) | Driver side COOL air mix servo motor target pulse / Min.: 0, Max.: 255 |
Customized value will be displayed | - |
OK |
---|
The display is as specified in the normal condition. |
Visually inspect the air mix servo motor (for driver side COOL).
Visually inspect whether the air mix servo motor (for driver side COOL) operates.
OK |
---|
The air mix servo motor (for driver side COOL) operates. |
Result | Proceed to |
---|---|
The Data List value changes and the air mix servo motor (for driver side COOL) operates (When troubleshooting according to the DTC output) | A |
The Data List value changes and the air mix servo motor (for driver side COOL) operates (When troubleshooting according to Problem Symptoms Table) | B |
The Data List value does not change and the air mix servo motor (for driver side COOL) does not operate | C |
The Data List value changes, but the air mix servo motor (for driver side COOL) does not operate | D |
B |
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
C |
REPLACE AIR CONDITIONING AMPLIFIER Click here |
D |
CHECK AIR MIX SERVO MOTOR (for Driver Side COOL) Click here |
A |
CHECK FOR DTC
Clear the DTCs Click here.
Check for DTCs Click here.
OK |
---|
DTC B1453/53 is not output. |
NG |
REPLACE AIR CONDITIONING AMPLIFIER Click here |
OK |
USE SIMULATION METHOD TO CHECK Click here
CHECK AIR MIX SERVO MOTOR (for Driver Side COOL)
Replace the air mix servo motor Click here.
Tech Tips
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.
Clear the DTCs Click here.
Check for DTCs Click here.
OK |
---|
DTC B1453/53 is not output. |
NG |
CHECK AIR CONDITIONING HARNESS ASSEMBLY Click here |
OK |
END (AIR MIX SERVO MOTOR [for Driver Side COOL] IS FAULTY)
CHECK AIR CONDITIONING HARNESS ASSEMBLY
Replace the air conditioning harness Click here.
Clear the DTCs Click here.
Check for DTCs Click here.
OK |
---|
DTC B1453/53 is not output. |
NG |
REPLACE AIR CONDITIONING AMPLIFIER Click here |
OK |
END (AIR CONDITIONING HARNESS IS FAULTY)