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System Testing: Starting and Charging System Tests
During this portion of the testing process, the tester will perform the following tests in
order:
• Starting System Cranking Test
• Charging System Test without Loads
• Charging System Test under Loads – Ripple Detect
• Charging System Test under Loads
Please follow the instructions below to run through the above testing steps.
1. Make sure the battery terminals are clean. See Preparing Battery to be Tested.
2. Connect tester leads to the battery, clamping the red clamp to the vehicle
positive battery terminal first. Then, clamp the black clamp to the vehicle
negative battery terminal second.
Note: Whenever possible, connect directly to the terminals/posts of the battery.
3. Upon completing a proper battery connection, the tester display will show the
Home Screen. Select SYSTEM TEST, scrolling as needed to bring the indicator
in line with SYSTEM TEST. Press “ENTER” (center button).
4. The display will confirm that the operator has chosen SYSTEM TEST. Press
“ENTER”.
5. Turn off all vehicle accessory loads such as lighting, air conditioning, radio, etc.
6. Start the engine. The display will show the minimum voltage reached by the
battery and provide an assessment of starting system condition. Assessment
corresponds as follows:
CRANKING VOLTS NORMAL – Starting System is showing normal draw.
CRANKING VOLTS LOW – Starting System is Weak – troubleshoot starter as
per manufacturer’s recommended procedure.
CRANKING VOLTS NOT DETECTED – Check connections, wiring, and starter
immediately.
7. After Starting System Test, press “ENTER” to go to Charging System Test,
beginning with the Charging System without Loads Test. The display will remind
you to ensure all loads are off – after making sure there are no loads on the
system, press “ENTER”.
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