Operation CHARM: Car repair manuals for everyone.
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)

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Internal NAV Module Failure







INTERNAL NAV MODULE FAILURE

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
When the Navigation Module is powered up.

- Set Condition:
The NAV unit fails the loop back (internal PCI bus circuitry) test. Unit will stay off-line unless loop back test is passed.





Diagnostic Test

1. NAVIGATION UNIT
With the scan tool, erase DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read DTCs.
If this DTC is active, view repair.

Repair

- Replace the Navigation Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.