Click here

TELEMATICS SYSTEM(for G-BOOK), Diagnostic DTC:B15DB

Click here
Click here
DTC Code DTC Name
B15DB Telematics Transceiver Disconnected
Click here

DESCRIPTION

If the radio receiver assembly cannot detect the telematics transceiver for a certain period of time (90 seconds) after the power switch is turned on (ACC) and the radio receiver assembly confirms that the information is missing by checking past telematics transceiver recognition information (registered information), this DTC will be stored.

Tip:

The LEXUS Enform system uses USB communication between devices. If an open, short, short to +B or short to ground occurs in the USB circuit, communication is interrupted and the LEXUS Enform system will not operate normally.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15DB Telematics Transceiver Disconnected Telematics transceiver disconnected

  • Harness or connector

  • Antenna cord sub-assembly (I/P)

  • Telematics transceiver

  • Radio receiver assembly

  • Navigation ECU
Tip:

This DTC may be stored due to environmental reasons such as electrical noise or interference.

Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note:

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

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

    Click here

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

  • When replacing the radio receiver assembly or navigation ECU, always replace it with a new one.

    If a radio receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:


    • A communication malfunction DTC may be stored.

    • The radio receiver assembly or navigation ECU may not operate normally.

Click here

PROCEDURE


  1. Click here

    CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      1. Body Electrical > Navigation System > Clear DTCs


    2. Turn the power switch off.

    3. Turn the power switch on (IG) and wait for 90 seconds.

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

      Click here


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - BATTERY AND BODY GROUND)


    1. Disconnect the G56 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G56-4 (E) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G56-1 (+B) - Body ground Power switch off 11 to 14 V
      G56-8 (ACC) - Body ground Power switch on (ACC) 11 to 14 V
      G56-7 (IG2) - Body ground Power switch on on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ANTENNA CORD SUB-ASSEMBLY [I/P])


    1. Disconnect the G53 radio receiver assembly connector.

    2. Disconnect the G152 Antenna cord sub-assembly (I/P) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G53-10 (USBV) - G152-5 (USBV) Always Below 1 Ω
      G53-11 (USBG) - G152-3 (USBG) Always Below 1 Ω
      G53-10 (USBV) - Body ground Always 10 kΩ or higher
      G53-11 (USBG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK ANTENNA CORD SUB-ASSEMBLY (I/P)


    1. B004XUJC01
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)
      *b

      Front view of wire harness connector

      (to Wire Harness)

      Disconnect the antenna connector from the telematics transceiver.

    2. Disconnect the antenna connector from the wire harness.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-5 (USBV) - G152-5 (USBV) Always Below 1 Ω
      A-3 (USBG) - G152-3 (USBG) Always Below 1 Ω
      A-5 (USBV) - Body ground Always 10 kΩ or higher
      A-3 (USBG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK RADIO RECEIVER ASSEMBLY (USBV, USBG)


    1. Disconnect the A telematics transceiver connector.

    2. B004RLAC03
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-3 (USBG) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A-5 (USBV) - A-3 (USBG) Power switch on (ACC) 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG

  6. Click here

    CHECK ANTENNA CORD SUB-ASSEMBLY (I/P)


    1. B004U41C08
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)
      *b

      Front view of wire harness connector

      (to Navigation ECU)

      Disconnect the antenna connector from the telematics transceiver.

    2. Disconnect the antenna connector from the navigation ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-2 (USB+) - USB-1 (USB+) Always Below 1 Ω
      A-1 (USB-) - USB-2 (USB-) Always Below 1 Ω
      A-6 (USBS) - USB-3 (USBS) Always Below 1 Ω
      A-2 (USB+) - Body ground Always 10 kΩ or higher
      A-1 (USB-) - Body ground Always 10 kΩ or higher
      A-6 (USBS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  7. Click here

    CHECK TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a new one.

      Click here

    2. Clear the DTCs.

      Click here


      1. Body Electrical > Navigation System > Clear DTCs


    3. Turn the power switch off.

    4. Turn the power switch on (IG) and wait for 90 seconds.

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

      Click here


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    • OK

      END (TELEMATICS TRANSCEIVER IS DEFECTIVE)

    • NGClick here
  8. Click here

    CHECK NAVIGATION ECU


    1. Replace the navigation ECU with a new one.

      Click here

    2. Clear the DTCs.

      Click here


      1. Body Electrical > Navigation System > Clear DTCs


    3. Turn the power switch off.

    4. Turn the power switch on (IG) and wait for 90 seconds.

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

      Click here


      1. Body Electrical > Navigation System > Trouble Codes


      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    • OK

      END (NAVIGATION ECU IS DEFECTIVE)

    • NG

      REPLACE RADIO RECEIVER ASSEMBLYClick here