G-BOOK SYSTEM, Diagnostic DTC:B15CC

DTC Code DTC Name
B15CC Backup Battery Failure

DESCRIPTION

If the telematics transceiver receives a result "Defect", "High Temperature" or "Low Voltage" or cannot receive any signals when mayday battery self-diagnosises.

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

  • Mayday battery

  • Harness or connector

  • Telematics transceiver

WIRING DIAGRAM

A01EPTHE01

INSPECTION PROCEDURE

Tech Tips

When replacing the telematics transceiver, perform the vehicle contract setting Click here.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTC Click here.

    2. Recheck for DTCs and check if the same trouble occurs again.

      OK
      No DTC is output.

    NG

    CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAYDAY BATTERY) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    1. Disconnect the P2 telematics transceiver connector.

    2. Disconnect the j1 mayday battery connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P2-30 (BBI+) - j1-1 (BBO+) Always Below 1 Ω
      P2-13 (BBI-) - j1-5 (BBO-) Always Below 1 Ω
      P2-20 (CTR1) - j1-3 (BTR1) Always Below 1 Ω
      P2-21 (CTR2) - j1-4 (BTR2) Always Below 1 Ω
      P2-30 (BBI+) - Body ground Always 10 kΩ or higher
      P2-13 (BBI-) - Body ground Always 10 kΩ or higher
      P2-20 (CTR1) - Body ground Always 10 kΩ or higher
      P2-21 (CTR2) - Body ground Always 10 kΩ or higher

    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 DTC Click here.

      2. Recheck for DTCs and check if the same trouble occurs again.

        OK
        No DTC is output.

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

    END (MAYDAY BATTERY IS DEFECTIVE)