HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type) B1443 Air Outlet Damper Control Servo Motor Circuit
DESCRIPTION
The No. 1 air conditioning radiator damper servo sub-assembly 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 these signals to move the air outlet damper to the appropriate position, which controls the air outlet switching.
The air conditioning amplifier assembly communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1443 | Air Outlet Damper Control Servo Motor Circuit | Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly | ·
No. 1 air conditioning radiator damper servo sub-assembly ·
Air conditioning harness assembly ·
Air conditioning amplifier assembly ·
Air conditioning radiator assembly |
Memorized
(30 sec. or more)* |
*: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | No. 1 air conditioning radiator damper servo sub-assembly operating | ○ | ○ |
| Malfunction | Air outlet damper servo operation request signals are output but the air outlet damper position sensor value does not change | ○ | - |
| Air outlet damper servo operation request signals are output but the air outlet damper position sensor value is abnormal | - | ○ | |
| Detection Time | Continuously for 30 seconds or more | Continuously for 30 seconds or more | |
| Trip Count | 1 trip | 1 trip | |
- HINT:
-
If the conditions of either of these patterns are detected, a DTC will be stored
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
This DTC is also output for the damper link, damper lock, etc. Before performing inspection, perform servomotor initialization and check that there are no mechanical malfunctions.
·This DTC is also output when servomotor initialization has failed. When servomotor initialization has failed, repair any malfunctions and perform servomotor initialization again.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
Check for DTCs.
- Body Electrical > Air Conditioner > Trouble Codes
- 50001 121
- Result:
Result Proceed to B1497 is output A B1441, B1442 and B1443 are output B Only B1443 is output C
A
B
C
Check that the No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.
- OK:
The No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.
- Result:
Proceed to OK NG
OK
NG
Check for a wire harness caught between the links of the motors and dampers.
- OK:
No wire harnesses are caught between the links of the motors and dampers.
- Result:
Proceed to OK NG
OK
NG
Remove the No. 1 air conditioning radiator damper servo sub-assembly.
Operate the dampers by hand.
- OK:
The dampers are easily operated by hand.
- Result:
Proceed to OK NG
OK
NG