NAVIGATION SYSTEM(for HDD) Navigation ECU Power Source Circuit

DTC Code DTC Name
Navigation ECU Power Source Circuit

DESCRIPTION

This is the power source circuit to operate the display and navigation module display.

WIRING DIAGRAM

E198310E05

CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BATTERY AND BODY GROUND)

    1. B122460C04

      *a

      Front view of wire harness connector

      (to Display and Navigation Module Display)

      Disconnect the H4 display and navigation module display connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H4-10 (GND1) - 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

      H4-1 (+B1) - H4-10 (GND1)

      Always

      11 to 14 V

      H4-3 (IG) - H4-10 (GND1)

      Engine switch on (IG)

      11 to 14 V

      H4-2 (ACC) - H4-10 (GND1)

      Engine switch on (ACC)

      11 to 14 V

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR