B1445/45
Diagnostic trouble codes
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.
| DTC No. |
DTC Detection Condition |
Trouble Area |
| B1445/45 |
Cool air by-pass damper control servo motor value does not change even if A/C control operated cool air bypass damper control servo motor |
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WIRING DIAGRAM
INSPECTION PROCEDURE
| 1. READ VALUE OF INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.
Expose the sensing portion of the solar sensor to light.
Select the item below in the Data List, and read the display on the intelligent tester.
| Item |
Measurement Item / Display (Range) |
Normal Condition |
Diagnostic Note |
| Cool Air Bypass Pulse (A/B Damp Pls) |
Passenger side cool air by-pass pulse / Min.: 0, Max.: 255 |
CLOSE: 50 (pulse) OPEN: 8 (pulse) |
- |
- OK:
- The display is as specified in the normal condition column.
- Result:
Result
Proceed to
NG
A
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE)
B
OK (When troubleshooting according to the DTC)
C
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| A | |
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| 2. REPLACE COOL AIR BY-PASS CONTROL SERVO MOTOR |
- HINT:
- 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.
Check for DTCs.
- Result:
Result
Proceed to
DTC B1445/45 is output
A
DTC B1445/45 is not output
B
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| A | ||
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