NAVIGATION SYSTEM, Diagnostic DTC:B1532

DTC Code DTC Name
B1532 LVDS Signal Malfunction (from Extension Module)

DESCRIPTION

The navigation ECU and the radio and display receiver assembly are connected via LVDS communication line.

This DTC is stored when an LVDS communication error occurs between the navigation ECU and the radio and display receiver assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1532

LVDS Signal Malfunction (from Extension Module)

When any of the following conditions is met:

  • Video signal (digital) is lost.

  • Navigation ECU is/was not connected while the ignition switch is/was ACC or ON.

  • Communication between the master unit and the navigation ECU is/was not possible when the engine is/was started.

  • Navigation ECU power source circuit

  • LVDS circuit between radio and display receiver assembly and navigation ECU

  • Navigation ECU

  • Radio and display receiver assembly

  • Harness and connector
Tip:

  • Even if no malfunction is present, this DTC may be stored depending on the battery condition or engine start voltage.

  • The radio and display receiver assembly is the master unit.

WIRING DIAGRAM

E276665E10

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU POWER SOURCE)

    1. Disconnect the V5 navigation ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      V5-2 (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

      V5-1 (+B) - V5-2 (GND)

      Always

      11 to 14 V

      V5-3 (ACC) - V5-2 (GND)

      Ignition switch ACC

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)Click here

    OK

  2. REPLACE HARNESS AND CONNECTOR (LVDS COMMUNICATION LINE)

    1. Replace the harness and connector (LVDS communication line) with a new or known good one.

    2. Clear the DTCs.

      Click hereClick here

      Body Electrical > Navigation System > Clear DTCs

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

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

  3. REPLACE NAVIGATION ECU

    1. Replace the navigation ECU with a new or known good one.

      for Sedan:Click hereClick here

      for Hatchback, Wagon:Click hereClick here

    2. Clear the DTCs.

      Click hereClick here

      Body Electrical > Navigation System > Clear DTCs

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

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    for Sedan:Click hereClick here

    for Hatchback, Wagon:Click hereClick here

  4. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

    1. Disconnect the V6 radio and display receiver assembly connector.

    2. Disconnect the V5 navigation ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      V6-4 (+B2) - V5-1 (+B)

      Always

      Below 1 Ω

      V6-3 (ACC2) - V5-3 (ACC)

      Always

      Below 1 Ω

      V6-8 (GND2) - V5-2 (GND)

      Always

      Below 1 Ω

      V6-4 (+B2) - Body ground

      Always

      10 kΩ or higher

      V6-3 (ACC2) - Body ground

      Always

      10 kΩ or higher

      V6-8 (GND2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    for Sedan:Click hereClick here

    for Hatchback, Wagon:Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR