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Chapter 6: System Test
Before starting the test, inspect the alternator drive belt. A belt that is glazed or worn, or lacks the proper
tension, will prevent the engine from achieving the rpm levels needed for the test.
The System Test includes 3 tests that provide a complete diagnosis of the vehicle’s electrical system:
• BATTERY TEST
• STARTER TEST
• ALTERNATOR TEST
Battery Test
The System Test includes a test of the battery to eliminate it as the cause of starting or charging problems.
Starter Test
1. Start the engine at the prompt.
2. The tester will display one of the starter decisions with the complete results in a series of screens.
Use the UP/DOWN ARROW keys to scroll to each screen.
To continue testing, press the
NEXT soft key.
NOTE: In some cases, the tester may not detect the vehicle’s starting pro le. It will display the
soft key options
STARTED and NO START. If you select STARTED, the alternator test will be
skipped. If you select NO START, the test process ends.
Decision Action
CRANKING NORMAL The starter voltage is normal and the battery is fully charged.
LOW VOLTAGE The starter voltage is low and the battery is fully charged.
CHARGE BATTERY The starter voltage is low and the battery is discharged. Fully charge the
battery and repeat the starter system test.
REPLACE BATTERY (If the battery test result was (REPLACE or BAD CELL.) The battery must be
replaced before testing the starter.
NO START The engine didn’t start and the test was aborted.
CRANKING SKIPPED The Tester didn’t detect the vehicle’s starting pro le and skipped the Starter
Test.
Chapter 6: System Test
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