GM Marine EFI
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Reset BLM Values (MEFI-5 and MEFI 6 only)
This function applies to MEFI-5 and MEFI-6 based engines that are equipped
with oxygen sensors. During engine operation the ECM learns and stores mod-
ifications to it’s factory preset fuel delivery values. This allows the ECM to adapt
itself to the unique operating conditions it is subjected to in a particular engine
application. The Reset BLM function allows a service technician to clear the
ECM’s learned values and reset the system back to factory default conditions.
Note: Always consult the engine manufacturer’s service literature prior to per-
forming this function. Under normal circumstances resetting the BLM values
should not need to be performed unless specified by the engine manufacturer.
ECM Output Tests Function
The TechMate scan tool has the ability to activate a number of ECM outputs for
diagnostic purposes. Upon selecting the ECM Output Tests menu choice the
scanner will interrogate the ECM in order to determine its version type. You will
then be presented with a menu listing all ECM outputs the scanner is capable of
triggering. Outputs are normally activated for one-second intervals.
WARNING! Please note that engine manufacturers may use individual ECM
outputs for manufacturer discretionary functions which differ from those
displayed by the scan tool. In order to avoid personal injury and unexpected
device activation always refer to the engine manufacturer’s service manual
before performing any output test
Summary of Contents for TechMate Pro
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