Service Manual

Page 7
BaTTerY inforMaTion - general
14) The Multimeter should now show a reading. Keep your eye on the meter and
watch the draw. A typical van can have from 18 to 28 computer modules in it.
They are all woke up when power was applied to the van by attaching your meter
probes. As you watch the current reading you will note that it will start to fall. This
happens as the computers in the van decide they are not needed and put
themselves to sleep. Chrysler says it can take up to thirty minutes for everything
to go into sleep mode.
The current should drop in stages similar to the sequence below:
a. The reading will start as high as 15-17 amps for a short period of time.
b. It then fall to 6-8 amps for a short time.
c. Then 1 to 1.5 amps for a period of time.
d. It will then settle on around .800 amps (800 Milliamps) for a while.
e. Then it may drop to .100 to .200 amps (100 to 200 Milliamps) for period of
time.
f. Finally it will drop all the way into sleep mode, .040 to .100 amps (40 to 100
Milliamps) and will stay there until the van is woke up.
g. Note: The values you will see will vary from van to van, from van type to
type and by the number and type of accessories installed on the van. The
important thing is that it drops to a value less the 100 Milliamps (.100
Amps) for a standard van when it goes into sleep mode.
15) You can wake the van simply by opening the driver’s side door for a few seconds,
then closing it.
16) Watch the meter again to see the van go into sleep mode again. You should repeat
this test until you are satisfied the van’s “Sleep Mode” is functioning correctly.