FORD VMM - Manual (Page 14)

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sers should perform the following checks to determine if they can resolve any problems with the
VMM unit. If the VMM is still inoperable after performing the checks, contact the Ford Technical
Information Support for assistance (see Support Instructions chapter for details).
Troubleshooting Table
Problem Symptoms Checks & Possible Causes
VMM will not power On (No LED's
turn On)
• Make sure that secure cable connections are made
between the VMM and vehicle
• Make sure that the cables do not have any bent,
broken, missing, or dirty/corroded cable connector pins
• Make sure that the VMM unit does not have any bent,
broken, missing, or dirty/corroded connector pins
• Make sure the VMM is powered from the vehicles
battery
• Verify battery voltage from the vehicle to the VMM is
sufficient (12 V nominal)
• If the VMM fails to power On after making all the
checks above, contact the Ford Technical Information
Support
VMM powers On, but operates
abnormally
• Cycle (remove/connect) the power to the VMM
• Make sure that the VMM’s LED 2 is on steady red
(passed Power On Self Test)
• If the VMM Power On Self Test (POST) fails, contact
the Ford Technical Information Support
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