NAVIGATION SYSTEM Vehicle Speed Signal Circuit between Radio Receiver and Extension Module

DESCRIPTION

The navigation ECU receives a vehicle speed signal from the radio and display receiver assembly and information from the navigation antenna assembly, and then adjusts vehicle position.

WIRING DIAGRAM

A01SFR8E01
*a Radio and Display Receiver Assembly
*b Navigation ECU

PROCEDURE


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


    1. Disconnect the V2 radio and display receiver assembly connector.

    2. Disconnect the V1 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V2-2 (SPD0) - V1-18 (SPD0) Always Below 1 Ω
      V2-2 (SPD0) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR