Navigation ECU Power Source Circuit

NAVIGATION: NAVIGATION SYSTEM: Navigation ECU Power Source Circuit

Navigation ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (DOME, ACC)
(a) Disconnect the DOME fuse from the engine room junction block.
(b) Disconnect the ACC fuse from the driver side junction block.
(c) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (NAVIGATION ECU - BATTERY AND BODY GROUND)




(a) Disconnect the N3 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:






Standard resistance





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE