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AIR CONDITIONING SYSTEM, Diagnostic DTC:B14B9

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DTC Code DTC Name
B14B9 Open in Ion Generator Circuit
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DESCRIPTION

The ion generator sub-assembly operates when both the ion generator switch and the blower switch are on. The air conditioning amplifier assembly sends a drive signal to the ion generator sub-assembly. When the ion generator sub-assembly receives the drive signal and starts to operate, it outputs an operation condition signal to the air conditioning amplifier assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B14B9 Open in Ion Generator Circuit

  • Diagnosis condition: Engine switch on (IG), blower switch on, ion generator switch on

  • Malfunction status: Open or short in ion generation circuit

  • Detection time: Continuously for 12 seconds or more

  • Harness or connector

  • Ion generator sub-assembly

  • Air conditioning amplifier assembly

 Memorized
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE


  1. Click here

    PERFORM ACTIVE TEST USING GTS (ION GENERATOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.


      1. Body Electrical > Air Conditioner > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Ion Generator Ion generator sub-assembly OFF or ON -



      1. Body Electrical > Air Conditioner > Active Test
        Tester Display
        Ion Generator




      OK
      Ion generator sub-assembly operates normally.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - BATTERY AND BODY GROUND)


    1. Disconnect the G89 ion generator sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G89-1 (IG) -Body ground Power switch on (IG) 11 to 14 V
      G89-1 (IG) -Body ground Power switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G89-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect the G89 ion generator sub-assembly connector.

    2. Disconnect the G65 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G65-26 (NAIN) - G89-3 (IG+) Always Below 1 Ω
      G65-7 (NANO) - G89-2 (PCL) Always Below 1 Ω
      G65-26 (NAIN) or G89-3 (IG+) - Other terminals and body ground Always 10 kΩ or higher
      G65-7 (NANO) or G89-2 (PCL) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS AND CONNECTOR

  4. Click here

    CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Disconnect the ion generator sub-assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G89-3 (IG+) - Body ground

      • Power switch on (IG)

      • Blower switch off

      • "nanoe" display: Off

      		 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK ION GENERATOR SUB-ASSEMBLY


    1. B004TD6C01
      *a

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G65-26 (NAIN) - Body ground

      • Power switch on (IG)

      • Blower switch off

      • "nanoe" display: Off

      		 Below 2.2 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

    • NG

      REPLACE ION GENERATOR SUB-ASSEMBLYClick here