G-BOOK SYSTEM(w/ Telematics Transceiver), Diagnostic DTC:B15CC

DTC Code DTC Name
B15CC Backup Battery Failure

DESCRIPTION

This DTC is stored when the telematics transceiver detects one of the following:

  • An open or short in the mayday battery circuit.

  • The mayday battery voltage drops or the mayday battery malfunctions.

  • The mayday battery temperature is (temporarily) high.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15CC

Backup Battery Failure

A mayday battery malfunction.

  • Harness or connector

  • Mayday battery

  • Telematics transceiver

WIRING DIAGRAM

E196669E21

PROCEDURE

  1. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

      Result

      Result

      NEXT
    NEXT

  2. CHECK FOR DTC

    1. Check for DTCs and check if the same trouble occurs again.

      Click here

      Body Electrical > Navigation System > Trouble Codes

      Result

      Result

      Proceed to

      DTC B15CC is output

      A

      DTC B15CC is not output

      B
    B

    USE SIMULATION METHOD TO CHECK

    Click here

    A

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

    1. Disconnect the G56 telematics transceiver connector.

    2. Disconnect the G2 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+) - G2-1 (BBO+)

      Always

      Below 1 Ω

      G56-13 (BBI-) - G2-5 (BBO-)

      Always

      Below 1 Ω

      G56-20 (CTR1) - G2-3 (BTR1)

      Always

      Below 1 Ω

      G56-21 (CTR2) - G2-4 (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

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE MAYDAY BATTERY

    1. Replace the mayday battery with a normal one.

      Click here

      Note:

      The mayday battery must not be replaced while an ACN call is in progress.

      Result

      Result

      NEXT
    NEXT

  5. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

      Result

      Result

      NEXT
    NEXT

  6. CHECK FOR DTC

    1. Check for DTCs and check if the same trouble occurs again.

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTC is output.

      Result

      Result

      OK

      NG
    OK

    END (MAYDAY BATTERY IS DEFECTIVE)

    NG

    REPLACE TELEMATICS TRANSCEIVER

    Click here