B1445

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1445/45: Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit

DTC B1445/45 - Front Passenger Seat Side Cool Air Bypass Damper Control Servo Motor Circuit

DESCRIPTION

The damper servo (cool air by-pass) sends pulse signals to inform the air conditioner amplifier of the damper position. The air conditioner amplifier activates the motor (normal, reverse) based on the signals to move the damper to any position. As a result, when the A/C is operating, the temperature of the air blowing toward the passenger's head area is controlled.
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
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Select the items below in the Data List, and read the displays on the Techstream.

Data List / Air Conditioner:





OK:
The display is as specified in the normal condition.

Result:





C -- REPAIR AIR CONDITIONING AMPLIFIER
B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
A -- Continue to next step.

2. REPLACE COOL AIR BY-PASS SERVOMOTOR
HINT: Since the servomotor cannot be inspected while it is removed from the vehicle, replace the servomotor with a normal one and check that the condition returns to normal.

OK:
Same problem does not occur.
OK -- END
NG -- REPAIR AIR CONDITIONING HARNESS