NAVIGATION SYSTEM, Diagnostic DTC:B1532

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

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
B1532

When one of the conditions below is met:


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

  • Communication between the radio and display receiver assembly 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 or connector

WIRING DIAGRAM

A005KIAE28
*a Radio and Display Receiver Assembly
*b Navigation ECU
*c LVDS Communication Line

PROCEDURE


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


    1. Disconnect the T4 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T4-2 (GND) - Body ground Always Below 1 Ω
    3. A005GQNE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T4-1 (B+) - T4-2 (GND) Always

      11 to 14 V*1

      9.5 to 14 V*2
      T4-3 (ACC) - T4-2 (GND) Ignition switch ACC

      11 to 14 V*1

      9.5 to 14 V*2

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

      Result
      Result Proceed to
      NG A
      OK B

    B

    REPLACE HARNESS AND CONNECTOR (LVDS COMMUNICATION LINE) Click here

    A

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


    1. Disconnect the T3 radio and display receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T3-3 (ACC2) - T4-3 (ACC) Always Below 1 Ω
      T3-4 (+B2) - T4-1 (B+) Always Below 1 Ω
      T3-8 (GND2) - T4-2 (GND) Always Below 1 Ω
      T3-3 (ACC2) - Body ground Always 10 kΩ or higher
      T3-4 (+B2) - Body ground Always 10 kΩ or higher
      T3-8 (GND2) - Body ground Always 10 kΩ or higher

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

  3. REPLACE HARNESS AND CONNECTOR (LVDS COMMUNICATION LINE)


    1. Replace the harness and connector (LVDS communication line).

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    OK

    END

    NG

  4. REPLACE NAVIGATION ECU


    1. Replace the navigation ECU Click here.

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    OK

    END

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here