AIR CONDITIONING SYSTEM, Diagnostic DTC:B14B9

DTC Code DTC Name
B14B9 Open in Ion Generator Circuit

DESCRIPTION

The No. 1 ion generator sub-assembly is controlled by the air conditioning amplifier assembly and operates in accordance with the blower motor with fan sub-assembly. 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. DTC Detection Condition Trouble Area
B14B9 Open in No. 1 ion generator sub-assembly circuit

  • Harness or connector between No. 1 ion generator sub-assembly and IG power source

  • Harness or connector between No. 1 ion generator sub-assembly and body ground

  • Harness or connector between No. 1 ion generator sub-assembly and air conditioning amplifier assembly

  • No. 1 ion generator sub-assembly

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A01G4SFE16

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    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.

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Ion Generator No. 1 ion generator sub-assembly OFF, ON -
      OK
      No. 1 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

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

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


    1. Disconnect the J3 No. 1 ion generator sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J3-2 (IG) - Body ground Engine switch off Below 1 V
      J3-2 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J3-5 (GND) - Body ground Always Below 1 Ω

    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 H54 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
      H54-26 (NAIN) - J3-1 (IG+) Always Below 1 Ω
      H54-15 (NANO) - J3-4 (PCL) Always Below 1 Ω
      H54-26 (NAIN) - Body ground Always 10 kΩ or higher
      H54-15 (NANO) - Body ground Always 10 kΩ or higher

    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 returns to normal.

    2. Check for DTCs.

      Result
      Result Proceed to
      DTC B14B9 is output A
      DTC B14B9 is not output B

    B

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

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here