Live Vehicle Testing (Fuel Pump) - Bosch MTS 5200 LAB SCOPE Manual

BOSCH MTS 5200 LAB SCOPE
Presented by Bob Pattengale
LIVE VEHICLE TESTING (FUEL INJECTORS)
The screen capture above illustrates what a known good injector pattern looks like on our subject
vehicle. As with the previous ignition patterns, you can switch between channel 1 and channel 2
to compare signals.
Also, and we cannot stress this enough, start capturing and saving these waveforms to your
database. This will allow you to compare vehicles in your bay to similar vehicles that you have
captured either good or bad waveforms.

LIVE VEHICLE TESTING (FUEL PUMP)

Moving on let's take a look at diagnosing fuel pumps.
For example purposes let's say you had a vehicle in your
shop that had 120,000 miles on it and you just
performed a major service on it costing the customer
over $1,500.00. Two weeks later the vehicle is back in
your shop with a no start condition.
More than likely the customer is going to think that the
problem they are having now was caused by you and
the costly service they just had done in your shop. Sad
but true, this happens too often in our industry.
Testing the fuel pump with the lab scope is a great way
to ensure preventive maintenance is performed
correctly. Most fuel pumps can be tested in 10 minutes
or less.
To test the fuel pump we not only need the lab scope but a 0 - 60 amp current probe as well.
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