Gateway ECU Power Source Circuit

NAVIGATION SYSTEM: Gateway ECU Power Source Circuit

Gateway ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ACC, ECU-IG, ECU-B)
(a) Disconnect the ACC and ECU-IG RH fuses from the driver side junction block
(b) Disconnect the ECU-B fuse from the engine room junction 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

(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 WIRE HARNESS (GATEWAY ECU - BATTERY AND BODY GROUND)

(a) Disconnect the G3 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