AIR CONDITIONING SYSTEM, Diagnostic DTC:B14B9

DTC Code DTC Name
B14B9 Open in Ion Generator Circuit

DESCRIPTION

The No. 1 ion generator sub-assembly operates when the blower switch is on. The air conditioning amplifier assembly sends a drive signal to the No. 1 ion generator sub-assembly. When the No. 1 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 Note
B14B9 Open in Ion Generator Circuit Open in No. 1 ion generator sub-assembly circuit

  • Harness or connector

  • No. 1 ion generator sub-assembly

  • Air conditioning amplifier assembly

Memorized

(12 seconds or more)

 -

Tech Tips

The air conditioning amplifier assembly stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the parentheses.

WIRING DIAGRAM

B006OJ5E07

CAUTION / NOTICE / HINT

Note


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

  • When the battery is disconnected or the air conditioning amplifier assembly is replaced, be sure to perform servo motor initialization.

    Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (ION GENERATOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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


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

      Body Electrical > Air Conditioner > Active Test
      Tester Display
      Ion Generator
      OK
      Ion generator changes using GTS.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (NO. 1 ION GENERATOR SUB-ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. B006N4MC08
      *a

      Front view of air conditioning harness assembly

      (to No. 1 Ion Generator Sub-assembly)

      Disconnect the No. 1 ion generator sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H6-4 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H6-1 (IG) - Body ground Engine switch off Below 1 V
      H6-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 ION GENERATOR SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect the H6 No. 1 ion generator sub-assembly connector.

    2. Disconnect the G36 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
      G36-26 (NAIN) - H6-3 (IG+) Always Below 1 Ω
      G36-15 (NANO) - H6-2 (PCL) Always Below 1 Ω
      G36-26 (NAIN) or H6-3 (IG+) - Body ground Always 10 kΩ or higher
      G36-15 (NANO) or H6-2 (PCL) - Body ground Always 10 kΩ or higher
      H6-3 (IG+) - H6-2 (PCL) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE NO.1 ION GENERATOR SUB-ASSEMBLY


    1. Replace the No. 1 ion generator sub-assembly.

      Click here

      Tech Tips

      Since the No. 1 ion generator sub-assembly cannot be inspected while it is removed from the vehicle, replace the No. 1 ion generator sub-assembly with a new or known good one and check that the condition ion returns to normal.

    2. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      OK
      DTC B14B9 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 ION GENERATOR SUB-ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY for LHD: Click here for RHD: Click here