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

A004SHDE06
*a No. 1 Navigation Wire
*b Radio and Display Receiver Assembly
*c Navigation ECU

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections Click here.

PROCEDURE


  1. CHECK NO. 1 NAVIGATION WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)


    1. Disconnect the z20 radio and display receiver assembly connector.

    2. Disconnect the z22 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z20-2 (SPDO) - z22-5 (SPD) Always Below 1 Ω
      z20-2 (SPDO) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPLACE NO. 1 NAVIGATION WIRE Click here