AIR CONDITIONING SYSTEM, Diagnostic DTC:B14B2

DTC Code DTC Name
B14B2 Lost Communication with Front Panel LIN

DESCRIPTION

The accessory meter assembly communicates with the air conditioning amplifier assembly through the LIN communication system.

The accessory meter assembly receives an operation signal from the radio receiver assembly via AVC-LAN communication. It then converts this signal to a LIN communication signal and sends it to the air conditioning amplifier assembly.

DTC No. DTC Detection Condition Trouble Area
B14B2 Lost communication with the accessory meter assembly.

  • Harness or connector between accessory meter assembly and power source circuit

  • Harness or connector between accessory meter assembly and body ground

  • LIN communication system

  • Accessory meter assembly

  • Air conditioning amplifier assembly

WIRING DIAGRAM

A01G6K2E01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - POWER SOURCE CIRCUIT)


    1. Disconnect the H86 accessory meter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H86-4 (B1) - Body ground Always 11 to 14 V
      H86-2 (IG+) - Body ground Engine switch off Below 1 V
      H86-2 (IG+) - Body ground Engine switch on (IG) 11 to 14 V
      H86-1 (ACC) - Body ground Engine switch off Below 1 V
      H86-1 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H86-16 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - ACCESSORY METER 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
      H86-11 (LIN1) - H54-37 (LIN1) Always Below 1 Ω
      H86-11 (LIN1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE ACCESSORY METER ASSEMBLY


    1. Replace the accessory meter assembly Click here.

      Tech Tips

      Since the accessory meter assembly cannot be inspected while it is removed from the vehicle, replace the accessory meter assembly with a new or known good one and same problem occurs again.

      OK
      Some problem does not occurs.
      Result
      Result Proceed to
      OK A
      NG (When troubleshooting according to Problem Symptoms Table) B
      NG (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

    END (ACCESSORY METER ASSEMBLY WAS DEFECTIVE)