NAVIGATION SYSTEM, Diagnostic DTC:B1568

DTC Code DTC Name
B1568 Clock Device Disconnected

DESCRIPTION

The radio receiver assembly and center cluster module circuit are connected via AVC-LAN communication line.

This DTC is stored when an AVC-LAN communication error occurs between the radio receiver assembly and center cluster module circuit.

DTC No. DTC Detection Condition Trouble Area
B1568 A device that is listed in the AVC-LAN connected device record of the master unit is missing.

  • Center cluster module circuit power source circuit

  • AVC-LAN circuit between radio receiver assembly and center cluster module circuit

  • Center cluster module circuit

  • Radio receiver assembly

  • Harness or connector

Tech Tips

The radio receiver assembly is the master unit.

WIRING DIAGRAM

B001N55E03

CAUTION / NOTICE / HINT

Note


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

PROCEDURE


  1. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    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 AVC-LAN communication.

      • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.


    B

    CHECK DTC Click here

    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 that no DTCs are output.

      OK
      No DTCs are output.

    OK

    END

    NG

  4. CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE CIRCUIT POWER SOURCE)


    1. Disconnect the H80 center cluster module circuit connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H80-16 (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
      H80-4 (+B) - H80-16 (GND) Power switch off 11 to 14 V
      H80-1 (ACC) - H80-16 (GND) Power switch on (ACC) 11 to 14 V
      H80-2 (IG+) - H80-16 (GND) Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (CENTER CLUSTER MODULE CIRCUIT - RADIO RECEIVER ASSEMBLY)


    1. Disconnect the H80 center cluster module circuit connector.

    2. Disconnect the H147 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H80-15 (TX1+) - H147-7 (TX1+) Always Below 1 Ω
      H80-13 (TX1-) - H147-8 (TX1-) Always Below 1 Ω
      H80-15 (TX1+) - Body ground Always 10 kΩ or higher
      H80-13 (TX1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE CENTER CLUSTER MODULE CIRCUIT


    1. Replace the center cluster module circuit with a new or known good one Click here.

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here