Operation CHARM: Car repair manuals for everyone.
Home >> Lincoln >> 2003 >> Aviator 2WD V8-4.6L DOHC >> Repair and Diagnosis >> Accessories and Optional Equipment >> Navigation System >> Testing and Inspection >> Pinpoint Tests >> Test F
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test F

PINPOINT TEST F: NAVIGATION SYSTEM DOES NOT OPERATE CORRECTLY - THE DISPLAY SCREEN IS INOPERATIVE


Test F1-F6:






Test F6-F7:






Test F7-F9:






Normal Operation
The audio unit display is controlled by the navigation system module. Video color is provided through circuits 1534 (BK), 1535 (BK), and 1536 (BK). Circuit 1537 (RD) provides the color synchronization and circuit 1538 (YE/RD) is the video signal return.

Possible Causes
- circuit 1534 (BK) open or shorted
- circuit 1535 (BK) open or shorted
- circuit 1536 (BK) open or shorted
- circuit 1537 (RD) open or shorted
- circuit 1538 (YE/RD) open or shorted
- navigation system module
- audio unit
pro multis · About Operation CHARM