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Old 08-21-2010, 02:47 PM
clearnetedm clearnetedm is offline
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Special Code

Hey Guys. A while back I remember reading a way to get into a diagnostic menu on the vehicle display. It would give more detail like RPM, temps, fuel rate, etc. It was a button and key sequence but I can't for the life of me find it in the forum's here. Hopefully someone still has this info or can point me to the past thread.
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Old 08-23-2010, 07:39 AM
chuck s chuck s is offline
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No one remembers? All I remember is holding down one or more buttons on the information panel but with three there are 7 more combinations (all up is default).

-- Chuck
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Old 08-23-2010, 12:54 PM
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berry1234 berry1234 is offline
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Found my old post using the 'message center rpm' in the search box.


Check the build date code of the IC. The date code is displayed in the message center during "engineering test mode".

Engineering Test Mode:

Ignition in "OFF" position.
Cluster type.
For Base Clusters (without message center cluster): depress the reset stem on the cluster while turning the ignition switch to the "ON" position.
Message Center Clusters: depress the reset button in the vehicle while turning the ignition switch to the "ON" position.
Continue to hold down the reset stem/button for 5 seconds until the cluster message center displays "engineering test mode".
Press/cycle reset stem/button until the message center displays "manufacture" and the date of manufacture (MM-DD-YYYY).
If the date is after 12/22/2006, this TSB does not apply and proceed with normal diagnostics found in Workshop Manual (WSM), Sections 413-01 and 413-08.
Turn the vehicle ignition to the "OFF" position to exit the "engineering test mode".
Outside Air Temperature (OAT) Diagnostics

Cant recall, but in test mode you can cycle through all the system monitoring options.
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