Navigation ECU Power Source Circuit

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 (ACC, RADIO NO. 1)
(a) Disconnect the ACC fuse from the driver side junction block.
(b) Disconnect the RADIO NO. 1 fuse from the engine room relay block.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT RELAY (Marking: ACC CUT)

(a) Disconnect the ACC CUT relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE RELAY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - BATTERY AND BODY GROUND)

(a) Disconnect the N8 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

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