TELEMATICS SYSTEM(for G-BOOK), Diagnostic DTC:B15CC

DTC Code DTC Name
B15CC Backup Battery Failure

DESCRIPTION

This DTC is stored when the telematics transceiver receives a result "Defect", "High Temperature" or "Low Voltage" or cannot receive any signals during the mayday battery self check.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15CC Backup Battery Failure Mayday battery malfunction

  • Mayday battery

  • Harness or connector

  • Telematics transceiver

WIRING DIAGRAM

B004SP3E06
*a Mayday Battery
*b Telematics Transceiver

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for G-BOOK.

    Click here

  • When replacing the telematics transceiver, make sure to replace it with a new one.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    2. Recheck for DTCs and check if the same DTC is output again.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      Result
      Result Proceed to
      B15CC is not output. A
      B15CC is output. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAYDAY BATTERY)


    1. Disconnect the G56 telematics transceiver connector.

    2. Disconnect the L145 mayday battery connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G56-30 (BBI+) - L145-1 (BBO+) Always Below 1 Ω
      G56-13 (BBI-) - L145-5 (BBO-) Always Below 1 Ω
      G56-20 (CTR1) - L145-3 (BTR1) Always Below 1 Ω
      G56-21 (CTR2) - L145-4 (BTR2) Always Below 1 Ω
      G56-30 (BBI+) - Body ground Always 10 kΩ or higher
      G56-13 (BBI-) - Body ground Always 10 kΩ or higher
      G56-20 (CTR1) - Body ground Always 10 kΩ or higher
      G56-21 (CTR2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK MAYDAY BATTERY


    1. Replace the mayday battery with a normal one and check if the same problem occurs again.

      Click here


      1. Clear the DTCs.

        Click here


        Body Electrical > Navigation System > Clear DTCs

      2. Recheck for DTCs and check if the same DTC is output again.

        Click here


        Body Electrical > Navigation System > Trouble Codes
      Result
      Result Proceed to
      B15CC is not output. A
      B15CC is output. B

    A

    END (MAYDAY BATTERY IS DEFECTIVE)

    B

    REPLACE TELEMATICS TRANSCEIVER Click here