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

DESCRIPTION

If the navigation computer sub-assembly cannot detect the DCM for a certain period of time (15 seconds) after the power switch is turned on (ACC) and the navigation computer sub-assembly 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

A003XLSE01

INSPECTION PROCEDURE

Note

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

Tech Tips

When replacing the navigation computer sub-assembly or telematics transceiver, perform the vehicle contract setting Click here.

PROCEDURE


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


    1. A003W1IE09
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Telematics Transceiver)

      Disconnect the H145 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-4 (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
      H145-1 (+B) - Body ground Power switch off 11 to 14 V
      H145-7 (IG2) - Body ground Power switch on (IG) 11 to 14 V
      H145-8 (ACC) - Body ground Power switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT NAVIGATION COMPUTER SUB-ASSEMBLY (USBV, USBG)


    1. A003YN0E08
      Text in Illustration
      *a

      Component without harness connected

      (Navigation Computer Sub-assembly)

      Disconnect the H132 navigation computer sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H132-2 (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
      H132-4 (USBV) - H132-2 (USBG) Power switch on (ACC) 4.5 to 5.25 V

    NG

    REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION COMPUTER SUB-ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Check the installation condition.


      1. Check the USB communication cable (digital communication cable) between the navigation computer sub-assembly and the telematics transceiver for any installation or connection problems.

    2. A003V23E06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation Computer Sub-assembly)
      *b

      Front view of wire harness connector

      (to Telematics Transceiver)

      Disconnect the H132 navigation computer sub-assembly connector.

    3. Disconnect the H133 telelmatics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H132-4 (USBV) - H133-4 (USBV) Always Below 1 Ω
      H132-2 (USBG) - H133-2 (USBG) Always Below 1 Ω
      H133-4 (USBV) - Body ground Always 10 kΩ or higher
      H133-2 (USBG) - Body ground Always 10 kΩ or higher
      Standard Resistance (USB Cable)
      Tester Connection Condition Specified Condition
      H132-1-2 (USB+) - H133-1-2 (USB+) Always Below 1 Ω
      H132-1-1 (USB-) - H133-1-1 (USB-) Always Below 1 Ω
      H132-1-3 (USBG) - H133-1-3 (USBS) Always Below 1 Ω
      H133-1-2 (USB+) - Body ground Always 10 kΩ or higher
      H133-1-1 (USB-) - Body ground Always 10 kΩ or higher
      H133-1-3 (USBS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a known good 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 NAVIGATION COMPUTER SUB-ASSEMBLY Click here

    A

    END