G-BOOK SYSTEM, Diagnostic DTC:B15CC

DTC Code DTC Name
B15CC Backup Battery Failure

DESCRIPTION

If the telematics transceiver receives a defect, high temperature or low voltage signal from the mayday battery or does not receive any signals during mayday battery self-diagnosis, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B15CC Mayday battery malfunction

  • Mayday battery

  • Wire harness or connector

  • Telematics transceiver

WIRING DIAGRAM

A00099NE05
*a Telematics Transceiver
*b Mayday Battery

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 Precautions for G-BOOK Click here.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check that no DTCs are output.

      OK
      No DTCs are output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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


    1. Disconnect the H101 telematics transceiver connector.

    2. Disconnect the H103 mayday battery connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H101-30 (BBI+) - H103-1 (BBO+) Always Below 1 Ω
      H101-13 (BBI-) - H103-5 (BBO-) Always Below 1 Ω
      H101-20 (CTR1) - H103-3 (BTR1) Always Below 1 Ω
      H101-21 (CTR2) - H103-4 (BTR2) Always Below 1 Ω
      H101-30 (BBI+) - Body ground Always 10 kΩ or higher
      H101-13 (BBI-) - Body ground Always 10 kΩ or higher
      H101-20 (CTR1) - Body ground Always 10 kΩ or higher
      H101-21 (CTR2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE MAYDAY BATTERY


    1. Replace the mayday battery with a known good one and check if the same DTC is output again Click here.


      1. Clear the DTCs Click here.

      2. Recheck for DTCs and check that no DTCs are output.

        OK
        No DTCs are output.

    OK

    END (MAYDAY BATTERY WAS DEFECTIVE)

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here