Navigation Receiver Assembly Power Source Circuit

NAVIGATION: NAVIGATION SYSTEM (for CrewMax): Navigation Receiver Assembly Power Source Circuit

Navigation Receiver Assembly Power Source Circuit

DESCRIPTION

The circuit provides power to the navigation receiver.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (RAD NO. 1, ACC)
(a) Disconnect the ACC fuse from the main body ECU.
(b) Disconnect the RAD NO. 1 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. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - BATTERY AND BODY GROUND)





(a) Disconnect the K18 receiver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:






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