Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - HEATING / AIR CONDITIONING

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (AIR OUTLET SERVO PULSE [D])

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

DTC B1443 Air Outlet Damper Control Servo Motor Circuit

DESCRIPTION

The No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) 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 outlet damper to any position, which controls the air outlet changes.


  • HINT:
  • Confirm that no mechanical problem is present because this trouble code may be stored when either a damper link or damper is mechanically locked.
DTC CodeDTC Detection ConditionTrouble Area
B1443 The air outlet damper position does not change for 30 seconds or more when the air conditioning amplifier assembly operates the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo).
No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo)
Air conditioning harness assembly
Air conditioning amplifier assembly

WIRING DIAGRAM

Dtc B1443 Air Outlet Damper Control Servo Motor Circuit. HEATING / AIR CONDITIONING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (AIR OUTLET SERVO PULSE [D])

Use the Data List to check if the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) is functioning properly ().

Air Conditioner
Tester DisplayMeasurement Item/RangeNormal ConditionDiagnostic Note
Air Outlet Servo Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) target pulse / Min.: 0, Max.: 255
FACE: 117 (pulse)
B/L: 93 (pulse)
FOOT: 41 (pulse)
F/D: 18 (pulse)
DEF: 6 (pulse)
-
  • OK:
  • The display is as specified in the normal condition column.
Result
ResultProceed to
OK (When troubleshooting according to the DTC)A
OK (When troubleshooting according to problem symptoms table)B
NGC
B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY ()
A
2.REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE DAMPER SERVO)

Temporarily replace the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo).

for LHD: .
for RHD: .
  • HINT:
  • Since the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) cannot be inspected while it is removed from the vehicle, replace the No. 1 air conditioning radiator damper servo sub-assembly (mode damper servo) with a new or normally functioning one.

Clear the DTCs ().

Check for DTCs ().

Result
ResultProceed to
DTC B1443 is not outputA
DTC B1443 is outputB
B
Go to step 3
A
END (NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY [MODE DAMPER SERVO] IS FAULTY)
3.REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Temporarily replace the air conditioning harness assembly with a new or normally functioning one.

for LHD: .
for RHD: .

Clear the DTCs ().

Check for DTCs ().

Result
ResultProceed to
DTC B1443 is not outputA
DTC B1443 is outputB
B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY ()
A
END (AIR CONDITIONING HARNESS ASSEMBLY IS FAULTY)
HEATING / AIR CONDITIONING
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
AIR CONDITIONING SYSTEM for Manual Air Conditioning System