NAVIGATION SYSTEM Navigation ECU Power Source Circuit

DESCRIPTION

This is the power source circuit to operate the navigation ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT NAVIGATION ECU

   
   

   1. 

      Disconnect the navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition p2-15 (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 p2-1 (+B) - p2-15 (GND1) Always 11 to 14 V p2-13 (ACC) - p2-15 (GND1) Engine switch on (ACC) 11 to 14 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY) Click here

   OK

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)

   
   

   1. 

      Disconnect the navigation ECU connector and multi-display connector.

   2. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition p2-15 (GND1) - p1-6 (GND2) Always Below 1 Ω p2-13 (ACC) - p1-7 (ACC2) Always Below 1 Ω p2-1 (+B) - p1-8 (+B) Always Below 1 Ω p2-15 (GND1) - Body ground Always 10 kΩ or higher p2-13 (ACC) - Body ground Always 10 kΩ or higher p2-1 (+B) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE MULTI-DISPLAY Click here