NAVIGATION SYSTEM (for HDD), Diagnostic DTC:B1596, B1563

DTC Code DTC Name
B1596 No Response from Remote Touch
B1563 Remote Touch Disconnected

DESCRIPTION

The display and navigation module display and the remote touch are connected by the MOST communication line.

When a MOST communication error occurs between the display and navigation module display and the remote touch, these DTCs will be stored.

DTC No. DTC Detection Condition Trouble Area
B1596 No response to the diagnostic memory request from the master unit.
  • Remote touch power source circuit

  • MOST circuit between display and navigation module display and remote touch

  • MOST circuit between remote touch and radio receiver assembly

  • Remote touch (remote operation board)

  • Display and navigation module display

B1563 A device that is listed in the MOST network connected device record of the master unit is missing.

Tech Tips

For the MOST network, the display and navigation module display is the master unit.

WIRING DIAGRAM

A01NEFUE01

INSPECTION PROCEDURE

Note


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

  • When replacing the display and navigation module display, perform vehicle contract setting (w/ G-BOOK system) Click here.

PROCEDURE


  1. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Check for optional components.


      1. Check that optional components (including associated wiring) which generate radio waves are not installed.

        Result
        Result Proceed to
        Optional components (including associated wiring) are installed. A
        Optional components (including associated wiring) are not installed. B

        Tech Tips


        • Electrical noise from radio waves generated by optional components or the wiring for those components may affect MOST communication.

        • This DTC may be stored when a MOST communication error occurs due to electrical noise.


    B
    A
  2. REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Remove optional components (including associated wiring).

      Note

      Do not remove optional components or associated wiring without the permission of the customer.


    NEXT
  3. CHECK DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

    NG
    OK
  4. CHECK HARNESS AND CONNECTOR (REMOTE TOUCH POWER SOURCE)


    1. A01NHGLE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Remote Touch)

      Disconnect the G13 remote touch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G13-1 (GND) - 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
      G13-8 (+B) - G13-1 (GND) Power switch off 11 to 14 V
      G13-7 (ACC) - G13-1 (GND) Power switch on (ACC) 11 to 14 V

    NG
    OK
  5. CHECK HARNESS AND CONNECTOR


    1. A01NFJ2E01

      Disconnect the G14 remote touch connector.

    2. A01NHO9E01

      Disconnect the G6 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G14-6 (MI+) - G6-3 (MO+) Always Below 1 Ω
      G14-5 (MI-) - G6-7 (MO-) Always Below 1 Ω
      G14-7 (SLDI) - G6-6 (SLDO) Always Below 1 Ω
      G14-6 (MI+) - Body ground Always 10 kΩ or higher
      G14-5 (MI-) - Body ground Always 10 kΩ or higher
      G14-7 (SLDI) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Remote Touch)

      *2

      Front view of wire harness connector

      (to Display and Navigation Module Display)


    NG
    OK
  6. CHECK HARNESS AND CONNECTOR


    1. A01NFJ2E02

      Disconnect the G14 remote touch connector.

    2. A01NCWRE01

      Disconnect the G12 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G14-1 (MO+) - G12-9 (MI+) Always Below 1 Ω
      G14-2 (MO-) - G12-23 (MI-) Always Below 1 Ω
      G14-3 (SLDO) - G12-10 (SLDI) Always Below 1 Ω
      G14-1 (MO+) - Body ground Always 10 kΩ or higher
      G14-2 (MO-) - Body ground Always 10 kΩ or higher
      G14-3 (SLDO) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Remote Touch)

      *2

      Front view of wire harness connector

      (to Radio Receiver Assembly)


    NG
    OK
  7. REPLACE REMOTE OPERATION BOARD


    1. Replace the remote operation board Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs and check if the same DTC is output again.

      OK
      No DTCs are output.

    NG
    OK