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Home >> Lincoln >> 2005 >> Aviator AWD V8-4.6L DOHC VIN H >> Repair and Diagnosis >> Accessories and Optional Equipment >> Navigation System >> Testing and Inspection >> Pinpoint Tests >> Test A: No Communication With the Navigation System Module
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Test A: No Communication With the Navigation System Module

PINPOINT TEST A: NO COMMUNICATION WITH THE NAVIGATION SYSTEM MODULE

A1-A2:






A2 Continued:






Normal Operation
Battery voltage is supplied to the navigation system module through circuit 1001 (WH/YE). The accessory/delay relay supplies voltage to the navigation system module through circuit 1002 (BK/PK). Circuit 1205 (BK) provides the navigation system module ground.

Possible Causes
- circuit 1001 (WH/YE) open or short to ground
- circuit 1002 (BK/PK) open or short to ground
- circuit 1205 (BK) open
- navigation system module
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