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 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. DTC Detection Condition Trouble Area
B1532

When any of the following conditions is met:


  • Video signal (digital) is lost

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

  • Communication between the radio and display receiver assembly and the navigation ECU is not possible when the engine is 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

A01EWJ2E21

INSPECTION PROCEDURE

PROCEDURE


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


    1. Disconnect the k3 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      k3-8 (GND2) - 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
      k3-4 (+B2) - k3-8 (GND2) Always 11 to 14 V
      k3-3 (ACC2) - k3-8 (GND2) Ignition switch ACC 11 to 14 V

    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.

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

      OK
      No DTCs are output.

    NG

    REPLACE NAVIGATION ECU Click here

    OK

    END

  3. REPLACE NAVIGATION ECU


    1. Replace the navigation ECU 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.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END

  4. CHECK NO. 1 NAVIGATION WIRE


    1. Disconnect the k2 radio and display receiver assembly connector.

    2. Disconnect the k3 navigation ECU connector.

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

      Standard Resistance:
      Tester Connection Condition Specified Condition
      k2-4 (+B2) - k3-4 (+B2) Always Below 1 Ω
      k2-3 (ACC2) - k3-3 (ACC2) Always Below 1 Ω
      k2-8 (GND2) - k3-8 (GND2) Always Below 1 Ω
      k2-4 (+B2) - Body ground Always 10 kΩ or higher
      k2-3 (ACC2) - Body ground Always 10 kΩ or higher
      k2-8 (GND2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 1 NAVIGATION WIRE Click here

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here