Bosch TECH 2 Manual page 46

BOSCH TECH 2
Presented by Bob Pattengale
is approved by gM for this purpose.
46
1-800-71-TRAIN (1-800-718-7246) OR www.auto-video.com
RePROgRAMMINg
vehicle setUp
step 2 of setting a vehicle Up for a Reflash is
to connect a clean power supply to the
electrical system.
We are going to use the Midtronics PsC-550 to
supply 13.4 volts of clean power to the
electrical system during the reflash process.
This will ensure that we have no AC ripple that
could cause the reflash process to fail.
There are other power supplies on the market
but the Midtronics PsC-550 is the only one that
step 3 of setting a vehicle Up for a Reflash is
to make sure you have the proper amount of
voltage at the DlC.
To do this we have plugged into the DlC what
is known as a line spy. This line spy allows us
to connect a multimeter to the DlC without
having to crawl underneath the dashboard.
As you can see, we have 13.44 volts showing
on the meter. This means that the clean power
supply that we have connected to the vehicle is
powering the terminals of the DlC.
The final step in the preparation process is to
verify the voltage in the PCM.
As you can see in the screen capture the
Ignition 1 signal is reading 13.2 volts. Anything
above 12.9 volts is acceptable for reflashing.