G-BOOK SYSTEM "NCON" is Displayed in "DCM" on the System Check Mode Screen

DESCRIPTION

If the display and navigation module display cannot detect the DCM for a certain period of time (15 seconds) after the power switch is turned on (ACC) and the display and navigation module display confirms that the information is missing by checking past DCM recognition information (registered information), "NCON" will be displayed.

The G-BOOK 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 G-BOOK system will not operate normally.

WIRING DIAGRAM

A01NHB2E15

INSPECTION PROCEDURE

Note

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

Tech Tips

When replacing the display and navigation module display or the telematics transceiver, perform the vehicle contract setting Click here.

PROCEDURE


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


    1. A01NEOLE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Telematics Transceiver)

      Disconnect the G25 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G25-4 (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
      G25-1 (+B) - Body ground Power switch off 11 to 14 V
      G25-7 (IG2) - Body ground Power switch on (IG) 11 to 14 V
      G25-8 (ACC) - Body ground Power switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY (USBV, USBG)


    1. A01NCTGE02
      Text in Illustration
      *1

      Component without harness connected

      (Display and Navigation Module Display)

      Disconnect the G30 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G30-2 (USBG) - 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
      G30-4 (USBV) - G30-2 (USBG) Power switch on (ACC) 4.5 to 5.25 V

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR


    1. Check the installation condition.


      1. Check the USB communication cable (digital communication cable) between the display and navigation module display and the telematics transceiver for any installation or connection problems.

    2. A01NDG6E20

      Disconnect the G30 display and navigation module display connector.

    3. A01NDG6E21

      Disconnect the G34 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G30-4 (USBV) - G34-4 (USBV) Always Below 1 Ω
      G30-2 (USBG) - G34-2 (USBG) Always Below 1 Ω
      G34-4 (USBV) - Body ground Always 10 kΩ or higher
      G34-2 (USBG) - Body ground Always 10 kΩ or higher
      Standard Resistance (USB Cable)
      Tester Connection Condition Specified Condition
      G30-1-2 (USB+) - G34-1-2 (USB+) Always Below 1 Ω
      G30-1-1 (USB-) - G34-1-1 (USB-) Always Below 1 Ω
      G30-1-3 (USBG) - G34-1-3 (USBG) Always Below 1 Ω
      G34-1-2 (USB+) - Body ground Always 10 kΩ or higher
      G34-1-1 (USB-) - Body ground Always 10 kΩ or higher
      G34-1-3 (USBG) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Display and Navigation Module Display)
      *2

      Front view of wire harness connector

      (to Telematics Transceiver)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a normal one and check if the same problem occurs again Click here.


      1. Perform inspections indicated on the System Check Mode screen to confirm the DCM inspection result Click here.

        Result
        Result Proceed to
        "OK" is displayed in "DCM" on the System Check Mode screen. A
        "NCON" is displayed in "DCM" on the System Check Mode screen. B

    B

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    A

    END