- REC/FRS damper servo motor
- Air conditioning harness assembly
- Air conditioning amplifier assembly
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Heating/Air Conditioning | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002LLJ009X |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B1442/42 |
Air Inlet Damper Control Servo Motor Circuit |
DESCRIPTION
The REC/FRS damper servo motor sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on the signals to move the air inlet damper to any position, which controls the intake air settings (fresh, fresh/recirculation and recirculation).
HINT:
Confirm that no mechanical problem is present because this trouble code can be stored when either a damper link or damper is mechanically locked.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1442/42 |
The air inlet damper position does not change even if the air conditioning amplifier assembly operates the REC/FRS damper servo motor. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (REC/FRS DAMPER SERVO MOTOR) |
(a) Use the Data List to check if the servo motor is functioning properly.
Air Conditioner
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Air Inlet Damper Targ Pulse |
REC/FRS damper servo motor target pulse / Min.: 9, Max.: 37 |
RECIRCULATION: 37 (pulse) FRESH: 9 (pulse) |
- |
OK:
The display is as specified in the normal condition.
|
|
2. |
CHECK REC/FRS DAMPER SERVO MOTOR (OPERATION) |
(a) Replace the REC/FRS damper 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.
|
|
3. |
CHECK FOR DTC |
(a) Clear the DTCs
.
(b) Check for DTCs
.
OK:
DTC B1442 is not output.
|
|
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