Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000015HNY
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 08/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1443; Air Outlet Damper Control Servo Motor Circuit; 2018 - 2022 MY Camry HV [07/2017 - 08/2022]

DTC

B1443

Air Outlet Damper Control Servo Motor Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • Confirm that no mechanical problem is present because this DTC can be output when either a damper link or damper is mechanically locked.
  • When installing the damper servo motor, make sure to install it correctly.

    Click here 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY

  • After replacing a damper servo motor, make sure to perform Servo Motor Initialization.

    Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: INITIALIZATION

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

B1497 is not output

A

B1497 is output

B
B

GO TO DTC B1497 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1497; Communication Malfunction (Bus Ic) 2019 - 2022 MY Camry HV [09/2018 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1497; Communication Malfunction (Bus Ic)

A

2.

INSPECT NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)

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

Click here 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY

OK:

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

NG

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

3.

INSPECT NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)

(a) 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.

NG

REMOVE PINCHED WIRE HARNESS
OK

4.

INSPECT NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (DAMPER)

(a) Remove the No. 3 air conditioning radiator damper servo sub-assembly.

Click here 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY

(b) Operate the dampers by hand.

OK:

The dampers are easily operated by hand.

NG

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL 2019 MY Camry HV [09/2018 - 09/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL 2020 MY Camry HV [09/2019 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL

OK

5.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Remove the No. 2 air conditioning radiator damper servo sub-assembly.

Click here 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY

(b) Connect the No. 2 air conditioning radiator damper servo sub-assembly connector to the No. 3 air conditioning radiator damper servo sub-assembly.

(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (IG).

(e) Turn the Techstream on.

(f) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(g) 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
  • *: 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.

OK

REPLACE AIR CONDITIONING HARNESS ASSEMBLY 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY

NG

REPLACE NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY 2018 MY Camry HV [07/2017 - 09/2018]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY 2021 - 2022 MY Camry HV [10/2020 - 08/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY