B1456

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1456/56: Passenger Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit
B1456/56 - Passenger Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit

DESCRIPTION

The mode damper servo (for passenger side FOOT/DEF) 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 mode damper servo (for passenger side FOOT/DEF) to any position, which controls the air outlet changes.

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 (AIR OUTLET SERVO MOTOR TARGET PULSE (for Passenger Side FOOT/DEF))

(a) Use the Data List to check if the servo motor is functioning properly.

Air conditioner





OK:

The display is as specified in the normal condition.

NG -- REPLACE AIR OUTLET SERVO MOTOR (for Passenger Side FOOT/DEF)

OK -- REPLACE AIR CONDITIONING AMPLIFIER Removal

2. REPLACE AIR OUTLET SERVO MOTOR (for Passenger Side FOOT/DEF)

(a) Replace the air outlet servo motor Disassembly.

HINT
Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one.

NEXT -- Continue to next step.

3. RECHECK DTC

(a) Clear the DTCs DTC Check / Clear.

(b) Check for DTCs DTC Check / Clear.

OK:

DTC B1456 is not output.

NG -- REPLACE AIR CONDITIONING HARNESS Disassembly

OK -- END (AIR OUTLET SERVO MOTOR (for Passenger Side FOOT/DEF) IS DEFECTIVE)