DTC B1443: Air Outlet Damper Control Servo Motor Circuit [10/2018 - 10/2020]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
5. Check for DTCs.

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   B1497 is not output	A
   B1497 is output	B

Result: 

B 

GO TO DTC B1497. Refer to  DTC B1497: Communication Malfunction (Bus Ic) [10/2018 - 10/2020]  

Result: 

A 

See step  2

1. Check that the No. 3 air conditioning radiator damper servo sub-assembly is installed correctly.

   Refer to REASSEMBLY [10/2018 - 10/2020]

   OK

   The No. 3 air conditioning radiator damper servo sub-assembly is installed correctly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSTALL NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY CORRECTLY 

Result: 

OK 

See step  3

1. 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

Result: 

NG 

REMOVE PINCHED WIRE HARNESS 

Result: 

OK 

See step  4

1. Remove the air conditioning radiator assembly.

   Refer to DISASSEMBLY [10/2018 - 10/2020]

2. Operate the dampers by hand.

   OK

   The dampers are easily operated by hand.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

OK 

See step  5

1. Remove the No. 2 air conditioning radiator damper servo sub-assembly.

   Refer to DISASSEMBLY [10/2018 - 10/2020]

2. Connect the No. 2 air conditioning radiator damper servo sub-assembly connector to the No. 3 air conditioning radiator damper servo sub-assembly.
3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
7. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   A/O Servo Pulse(Rr D)	No. 2 air conditioning radiator damper servo sub-assembly pulse*	Min.: 128 Max.: 383	Operates between 158 and 260 pulses

   1. *: Thus this Active Test is for the No. 2 air conditioning radiator damper servo sub-assembly, in this case it is used to check the operation of the No. 3 air conditioning radiator damper servo sub-assembly.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   A/O Servo Pulse(Rr D)

   OK

   The No. 3 air conditioning radiator damper servo sub-assembly operates.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING HARNESS ASSEMBLY. Refer to  DISASSEMBLY [10/2018 - 10/2020] 

Result: 

NG 

REPLACE NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY. Refer to  DISASSEMBLY [10/2018 - 10/2020]