NAVIGATION SYSTEM(for Radio and Display Type), 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 by the 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 one of the conditions below is met:


  • Video signal (digital) is lost.

  • Navigation ECU is/was not connected while the engine switch is/was on (ACC) or on (IG).

  • 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

  • No. 1 navigation wire

Tech Tips

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

WIRING DIAGRAM

A0027TZE03

PROCEDURE


  1. CHECK NO. 1 NAVIGATION WIRE (NAVIGATION ECU POWER SOURCE)


    1. Disconnect the n4 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      n4-2 (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
      n4-1 (+B) - n4-2 (GND) Always 11 to 14 V
      n4-3 (ACC) - n4-2 (GND) Engine switch on (ACC) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK NO. 1 NAVIGATION WIRE Click here

    OK

  2. REPLACE NO. 1 NAVIGATION WIRE


    1. Replace the No. 1 navigation wire with a new or known good one.

      Click here

    2. Clear the DTCs.

      Click 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.

      Click here

    2. Clear the DTCs.

      Click 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 Click here

  4. CHECK NO. 1 NAVIGATION WIRE


    1. Disconnect the n3 radio and display receiver assembly connector.

    2. Disconnect the n4 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      n3-4 (+B2) - n4-1 (+B) Always Below 1 Ω
      n3-3 (ACC2) - n4-3 (ACC) Always Below 1 Ω
      n3-8 (GND2) - n4-2 (GND) Always Below 1 Ω
      n3-4 (+B2) - Body ground Always 10 kΩ or higher
      n3-3 (ACC2) - Body ground Always 10 kΩ or higher
      n3-8 (GND2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE NO. 1 NAVIGATION WIRE Click here