Starting System Test - Snap-On MicroVAT Benutzerhandbuch

MicroVAT™
4. Select BATTERY TEST using scrollwheel and
selection arrow. Press Y (YES) button to advance to
test.
   
MicroVAT tester checks for proper
connections. If a bad or a non-connection is
determined, MicroVAT tester displays
CONNECT LEADS.
5. MicroVAT tester displays ENTER BATTERY SIZE.
   
To change battery unit measurement, go to the
SET-UP/OPTIONS MENU and use the
scrollwheel to choose SELECT BAT UNITS.
Press the Y (YES) button to continue and,
using scrollwheel, select the desired units.
Press the Y (YES) button to enter the selection.
6. Turn scrollwheel to change displayed battery rating
to desired value, then press Y (YES) button to enter
displayed unit.
— MicroVAT tester displays results in approximately
5 seconds. If additional details are desired turn
scrollwheel or press N (NO) button to return to
menu options.
7. In case of emergency, (tester begins smoking or
sparking, or if other signs of overheating or possible
damage to tester, battery, or vehicle occur), stop
testing immediately by removing the leads from the
battery. To stop testing in non-emergency situations,
press N (NO) button to reset internal software.
— If print out is desired, have printer turned ON,
align MicroVAT tester infrared LED with printer
infrared window and press Y (YES) button.
— Keep MicroVAT tester pointed at the printer until
printing is complete.
E-10
Troubleshooting — Battery Passes Tests But
Performance is Unsatisfactory
If battery passes tests but has performed unsatisfactory
in service, check the following possible causes.
• Accessories are left on for an extended period of time,
• Vehicle has improper replacement battery,
• Abnormally slow driving, or short driving periods with
accessories on,
• Defects in charging system, such as:
— Slipping drive belt or other defective drive
mechanism,
— High resistance, or
— Faulty alternator, generator or voltage regulator.
• Defects in electrical system, such as poor electrical
connections,
• Battery needs charging,
• Poor battery cable to terminal connection,
• Loose or over tightened battery hold-down,
• Electrical demand exceeds charging system capacity,
which can be caused by the addition of aftermarket
accessories,
• Excessive parasitic drain or long periods of vehicle
storage without disconnecting battery, or
• Check starter operation.

Starting System Test

The MicroVAT tester can perform two different starter
tests. The first test is called NORMAL TEST. The ignition
system is not disabled for this voltage draw test. The
second test is called EXTENDED TEST. For this test the
ignition system must be disabled and the high amp probe
connected to obtain a current draw reading. Use the test
procedures and information in this section to determine if
there are starting system problems.
   
Before testing starter, battery should be tested
and replaced if necessary.
   
Battery should be well charged.
   
Refer to Testing Tips
Inspection page E-8
on
tests.
— If the wrong amp probe is attached for
testing, MicroVAT tester displays an error
message.
on page E-7 and Visual
, before performing any