AIR CONDITIONING SYSTEM(for Manual Air Conditioning System), Diagnostic DTC:B1443

DESCRIPTION

According to signals from the air conditioning amplifier assembly that are based on user operation or air conditioning system control, the air conditioning radiator damper servo sub-assembly (mode switching) actuates the servo motor to perform air outlet mode switching.

• *1: 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

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS (AIR OUTLET (FRONT))

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch ON.

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > Air Conditioner > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Air Outlet (Front)	No. 2 air conditioning radiator damper servo sub-assembly (mode switching)	Min.: 0 Max.: 100	Operates between 0 to 100%

      
      Body Electrical > Air Conditioner > Active Test

      Tester Display
      Air Outlet (Front)

      OK
      No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operates normally.

      Result
      Result Proceed to NG (When troubleshooting according to Problem Symptoms Table) A NG (When troubleshooting according to the DTC) B OK (When troubleshooting according to Problem Symptoms Table) C OK (When troubleshooting according to the DTC) D

   
   

   B

   INSPECT AIR CONDITIONING HARNESS ASSEMBLY (HEATER RADIATOR UNIT SUB-ASSEMBLY) Click here

   C

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   D

   CHECK FOR DTC Click here

   A

2. INSPECT NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE SWITCHING) (MOTOR, LINK, DAMPER)

   
   

   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

   
   

   NG

   REMOVE PINCHED WIRE HARNESS

   OK

3. INSPECT AIR CONDITIONING RADIATOR ASSEMBLY (DAMPER)

   
   

   1. Remove the No. 2 air conditioning radiator damper servo sub-assembly (mode switching).

      Click here

   2. Operate the dampers by hand.

      OK
      The dampers are easily operated by hand.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE SWITCHING) Click here

   OK

4. INSPECT AIR CONDITIONING HARNESS ASSEMBLY (HEATER RADIATOR UNIT SUB-ASSEMBLY)

   
   

   1. Remove the air conditioning harness assembly (heater radiator unit sub-assembly).

      Click here

   2. 

      *a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)
      *b	Front view of wire harness connector (to No. 2 air conditioning radiator damper servo sub-assembly (mode switching))

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition F7A-16 (A1AO) - AO-1 (A1AO) Always Below 1 Ω F7A-32 (BAO) - AO-2 (BAO) Always Below 1 Ω F7A-4 (A2AO) - AO-3 (A2AO) Always Below 1 Ω F7A-8 (B1AO) - AO-4 (B1AO) Always Below 1 Ω F7A-6 (B2AO) - AO-6 (B2AO) Always Below 1 Ω F7A-16 (A1AO) or AO-1 (A1AO) - Body ground Always 10 kΩ or higher F7A-32 (BAO) or AO-2 (BAO) - Body ground Always 10 kΩ or higher F7A-4 (A2AO) or AO-3 (A2AO) - Body ground Always 10 kΩ or higher F7A-8 (B1AO) or AO-4 (B1AO) - Body ground Always 10 kΩ or higher F7A-6 (B2AO) or AO-6 (B2AO) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE AIR CONDITIONING HARNESS ASSEMBLY (HEATER RADIATOR UNIT SUB-ASSEMBLY) Click here

   OK

5. REPLACE NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE SWITCHING)

   
   

   1. Replace the No. 2 air conditioning radiator damper servo sub-assembly (mode switching) with a new one or the No. 1 blower damper servo sub-assembly (fresh/recirculation) if it is functioning properly.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

6. PERFORM ACTIVE TEST USING GTS (AIR OUTLET (FRONT))

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch ON.

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > Air Conditioner > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Air Outlet (Front)	No. 2 air conditioning radiator damper servo sub-assembly (mode switching)	Min.: 0 Max.: 100	Operates between 0 to 100%

      
      Body Electrical > Air Conditioner > Active Test

      Tester Display
      Air Outlet (Front)

      OK
      No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operates normally.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MODE SWITCHING) Click here

   NG

7. CHECK FOR DTC

   
   

   1. Clear the DTCs.

      Click here

      
      Body Electrical > Air Conditioner > Clear DTCs

   2. Check for DTCs.

      Click here

      
      Body Electrical > Air Conditioner > Trouble Codes

      Result
      Result Proceed to DTCs are not output A DTCs are output B

   
   

   A

   USE SIMULATION METHOD TO CHECK Click here

   B

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here