AIR CONDITIONING SYSTEM(for Manual Air Conditioning System), Diagnostic DTC:B1497/97

DTC Code DTC Name
B1497/97 BUS IC Communication Malfunction

DESCRIPTION

The air conditioning harness assembly connects the air conditioning amplifier assembly and each servo motor. The air conditioning amplifier assembly supplies power and sends operation instructions to each servo motor through the air conditioning harness assembly. Each servo motor sends the damper position information to the air conditioning amplifier assembly.

DTC Code DTC Detection Condition Trouble Area
B1497/97 An open circuit or malfunction in the communication line.

  • Harness or connector

  • Air mix damper servo sub-assembly

  • Air outlet damper servo sub-assembly

  • Air inlet damper servo sub-assembly

  • Air conditioning harness assembly

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A0057WQE03

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1497/97 is not output A
      DTC B1497/97 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)


    1. A0054D9E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (Air Conditioning Amplifier Assembly)

      Disconnect the D101 amplifier connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D101-21 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Check the operation by referring to the table below.

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Air Mix Servo Targ Pulse (D) Driver side air mix servo motor pulse

      Min.: 5, Max.: 92 (for LHD)

      Min.: 6, Max.: 93 (for RHD)

      		 -
      Air Outlet Servo Pulse (D) Driver side air outlet servo motor pulse Min.: 5, Max.: 47 -
      Air Inlet Damper Targ Pulse Air inlet damper target pulse

      Min.: 7, Max.: 19 (for LHD)

      Min.: 7, Max.: 25 (for RHD)

      		 -
      OK
      Arm of the damper servo motor selected in the Active Test moves smoothly.

    6. According to the test result, proceed to the next step.

      Result
      Result Proceed to
      Air inlet damper servo sub-assembly is malfunctioning A
      Air outlet damper servo sub-assembly is malfunctioning B
      Air mix damper servo sub-assembly is malfunctioning C
      All of the damper servo motors are malfunctioning D

    B

    CHECK AIR OUTLET DAMPER SERVO SUB-ASSEMBLY Click here

    C

    CHECK AIR MIX DAMPER SERVO SUB-ASSEMBLY Click here

    D

    CHECK AIR CONDITIONING HARNESS ASSEMBLY Click here

    A

  4. CHECK AIR INLET DAMPER SERVO SUB-ASSEMBLY


    1. Replace the air inlet damper servo sub-assembly Click here.

      Tech Tips

      Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or normally functioning one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1497/97 is not output A
      DTC B1497/97 is output B

    A

    END (AIR INLET DAMPER SERVO SUB-ASSEMBLY IS DEFECTIVE)

    B

    CHECK AIR CONDITIONING HARNESS ASSEMBLY Click here

  5. CHECK AIR OUTLET DAMPER SERVO SUB-ASSEMBLY


    1. Replace the air outlet damper servo sub-assembly Click here.

      Tech Tips

      Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or normally functioning one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1497/97 is not output A
      DTC B1497/97 is output B

    A

    END (AIR OUTLET DAMPER SERVO SUB-ASSEMBLY IS DEFECTIVE)

    B

    CHECK AIR CONDITIONING HARNESS ASSEMBLY Click here

  6. CHECK AIR MIX DAMPER SERVO SUB-ASSEMBLY


    1. Replace the air mix damper servo sub-assembly Click here.

      Tech Tips

      Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or normally functioning one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1497/97 is not output A
      DTC B1497/97 is output B

    A

    END (AIR MIX DAMPER SERVO SUB-ASSEMBLY IS DEFECTIVE)

    B

  7. CHECK AIR CONDITIONING HARNESS ASSEMBLY


    1. Replace the air conditioning harness assembly Click here.

      Tech Tips

      Since the air conditioning harness assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning harness assembly with a new or normally functioning one.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1497/97 is not output A
      DTC B1497/97 is output B

    A

    END (AIR CONDITIONING HARNESS ASSEMBLY IS DEFECTIVE)

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here