AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System with Side-mounted Air Conditioner Pressure Sensor), 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 Open in ion generator sub-assembly circuit

  • Harness or connector between ion generator sub-assembly and IG circuit

  • Harness or connector between ion generator sub-assembly and body ground

  • Harness or connector between ion generator sub-assembly and air conditioning amplifier assembly

  • Ion generator sub-assembly

  • Air conditioning amplifier assembly

Memorized

(12 seconds or more)*

WIRING DIAGRAM

A001VFDE04

CAUTION / NOTICE / HINT

Note


  • If the battery voltage is low, the ion generator may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the battery, referring to On-vehicle Inspection for the charging system.

    Click here

  • If the battery voltage is low, the ion generator may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

    Click here

  • 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 ignition switch to 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
      Ion Generator Ion generator sub-assembly OFF, ON -

      Body Electrical > Air Conditioner > Active Test
      Tester Display
      Ion Generator
      OK
      Ion generator sub-assembly operates normally.
      Result
      Result Proceed to
      NG A
      OK (When troubleshooting according to Problem Symptoms Table) B
      OK (When troubleshooting according to the DTC) C

    B

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

    C

    CHECK FOR DTC Click here

    A

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


    1. Disconnect the G2 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
      G2-1 (IG+) -Body ground Ignition switch ON 11 to 14 V
      G2-1 (IG+) -Body ground Ignition 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
      G2-4 (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 F73 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F73-26 (NAIN) - G2-3 (IG+) Always Below 1 Ω
      F73-7 (NANO) - G2-2 (PCL) Always Below 1 Ω
      F73-26 (NAIN) or G2-3 (IG+) - Body ground Always 10 kΩ or higher
      F73-7 (NANO) or G2-2 (PCL) - 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 COMMUNICATION POWER SUPPLY


    1. Reconnect the F73 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G2-3 (IG+) - Body ground

      • Ignition switch to ON

      • Blower switch 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. Reconnect the G2 air conditioning amplifier assembly connector.

    2. A005OW9C22
      *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
      F73-26 (NAIN) - Body ground

      • Ignition switch to ON

      • Blower switch Lo

      		 Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPLACE ION GENERATOR SUB-ASSEMBLY Click here

  6. 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