Midtronics MDX-700HD: Pack Testing A Class 8 Truck

Midtronics MDX-700HD: Pack Testing A Class 8 Truck


[music starts]
this video is to introduce you to
the MDX-700HD tester from Midtronics
the tester is designed for commercial vehicles particularly
when a technician approaches a vehicle
if they access the batteries
you’re going to connect the negative test clamp
to the negative cable, it’s the primary ground
and the positive cable that’s going directly to the starter
once the tester is connected
the screen will automatically come on
and you can enter the vehicle
from the drivers seat you’ll be ready to test
we are in vehicle testing
we can test individual batteries out of the vehicle as well
but in this case we’re in the vehicle
and they are top post batteries
these are standard group 31 truck batteries
so we’ll select that from the menu options
you’ll note that there are several options available
it’s a general purpose tool
but it’s tailored specifically for heavy duty vehicles
with up to six batteries
in this case we’re selecting four batteries
and they are 12 volt batteries
they are regular flooded batteries
there are different algorithms as well
for the AGM Flat Plate and the AGM Spiral
they have slightly different characteristics
so we have to adjust for those properly
by pressing enter we’re going to select the battery rating type
and it is CCA’s
there are multiple ratings available of course
but the standard that we typically see
in the trucking industry is the Cold Cranking Amp rating
all the standard battery ratings
that are used in the automotive industry
today are also represented in this tool
the batteries in this vehicle are rated in CCA’s
at 700 CCA’s
so we’ll select that
when you select test
the battery pack test results will be displayed
good pack, we got the measured voltage
and the rated CCA
there are several pack test results that may come up
we’ve got a good battery test
now we’re going to simply press enter
and the prompt is to start the engine
ideally you’ll have all the stable vehicle loads turned off
at this time prior to the start
when you have the green light to start
[engine starts]
crank the engine
when you crank you’re going to get a display
where it says the result is starting system normal
it also displays
the measured voltage at the time of crank
and the time it took to crank
there could be some other results
that would come up during this portion of the test
and cranking skipped could be the result
if you happen to have an air starter in the vehicle
for the charging system test
we’re going to go ahead and simply hit enter
it’s looking for DC voltage
looking for alternator output
it’s going to prompt you to rev the engine
we’re looking for the measured DC voltage
and AC voltage
and go back down to idle
with the loads off
taking one more analysis
now it’s asking you to turn on
all the stable vehicle loads
don’t turn on the windshield wipers
because that could scuff the windshield
and it’s an impulse type load
stable loads only
now we’re going to rev the engine
1,500 to 2,000 rpm
it’s capturing the information
and revs were detected
so now you go back to engine idle
hit enter and it’s safe to start turning all the loads off
the actual test is completed
at this point in time
now by hitting enter once again
you can review all the test information
no problems were found
and the voltage was the same
whether loaded or not loaded
there are some outputs that might be identified
if there were a problem with the alternator output
you can print out that information
and provide a written copy
either for the customer or for our own records
to keep track of this particular vehicle
the results are indicated from top to bottom
battery test is good
cranking is normal
charging system shows no problems
this can be utilized as a PDI tool
as a simple service tool
or doing more direct service operations
when the test is completed
the vehicle is safe to back out on the road
[music]
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