AIR CONDITIONING SYSTEM, Diagnostic DTC:B14BA

DTC Code DTC Name
B14BA Open in Rear Ion Generator Circuit

DESCRIPTION

The No. 2 ion generator sub-assembly operates when both the ion generator switch (air purifier switch assembly) and the rear blower switch are on. The A/C amplifier sends a drive signal to the No. 2 ion generator sub-assembly. When the No. 2 ion generator sub-assembly receives the drive signal and starts to operate, it outputs an operation condition signal to the A/C amplifier.

DTC No. DTC Detection Condition Trouble Area
B14BA Open in No. 2 ion generator sub-assembly circuit

  • No. 2 ion generator sub-assembly

  • Harness or connector between No. 2 ion generator sub-assembly and A/C amplifier

  • Harness or connector between No. 2 ion generator sub-assembly and IG circuit

  • Harness or connector between No. 2 ion generator sub-assembly and body ground

  • A/C amplifier

WIRING DIAGRAM

A01CCZBE05

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connector the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / 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*1 or No. 2 ion generator sub-assembly*2 OFF, ON -

      • *1: w/ No. 1 Ion Generator Sub-assembly

      • *2: w/ No. 2 Ion Generator Sub-assembly

      OK
      No. 2 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 A/C AMPLIFIER Click here

    A

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


    1. Disconnect the G34 A/C amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R24-5 (RGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 2 ION GENERATOR SUB-ASSEMBLY - BATTERY)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R24-2 (RIG) - Body ground Engine switch off Below 1 V
      R24-2 (RIG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 2 ION GENERATOR SUB-ASSEMBLY - A/C AMPLIFIER)


    1. Disconnect the G34 A/C amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G34-5 (RNIN) - R24-1 (RIG+) Always Below 1 Ω
      G34-12 (RNNO) - R24-4 (RPCL) Always Below 1 Ω
      G34-5 (RNIN) - Body ground Always 10 kΩ or higher
      G34-12 (RNNO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE NO. 2 ION GENERATOR SUB-ASSEMBLY


    1. Replace the No. 2 ion generator sub-assembly Click here.

      Tech Tips

      Since the No. 2 ion generator sub-assembly cannot be inspected while it is removed from the vehicle, replace the No. 2 ion generator sub-assembly with a new or a known good one and check that the condition returns to normal.

    2. Check for the DTC.

      Result
      Result Proceed to
      DTC B14BA is not output A
      DTC B14BA is output B

    B

    REPLACE A/C AMPLIFIER Click here

    A

    END (NO. 2 ION GENERATOR SUB-ASSEMBLY WAS DEFECTIVE)