AIR CONDITIONING SYSTEM, Diagnostic DTC:B14B9

DTC Code DTC Name
B14B9 Open in Ion Generator Circuit

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: Power 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

WIRING DIAGRAM

B000S44E10

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    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.


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

      Body Electrical > Air Conditioner > Active Test
      Tester Display
      Ion Generator
      OK
      Ion generator sub-assembly operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - POWER SOURCE)


    1. B000OA4C13
      *a

      Front view of wire harness connector

      (to Ion Generator Sub-assembly)

      Disconnect the P81 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
      P81-1 (IG) -Body ground Power switch on (IG) 11 to 14 V
      P81-1 (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
      P81-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the P81 ion generator sub-assembly connector.

    2. Disconnect the P58 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
      P58-26 (NAIN) - P81-3 (IG+) Always Below 1 Ω
      P58-7 (NANO) - P81-2 (PCL) Always Below 1 Ω
      P58-26 (NAIN) or P81-3 (IG+) - Other terminals and body ground Always 10 kΩ or higher
      P58-7 (NANO) or P81-2 (PCL) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. B000OA4C12
      *a

      Front view of wire harness connector

      (to Ion Generator Sub-assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P81-3 (IG+) - Body ground

      • Power switch on (IG)

      • Blower switch off

      • "nanoe" display: off

      		 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

  5. CHECK ION GENERATOR SUB-ASSEMBLY OUTPUT


    1. B000QNIC03
      *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
      P58-26 (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 ASSEMBLY Click here

    NG

    REPLACE ION GENERATOR SUB-ASSEMBLY Click here