Troubleshooting - TOHATSU BFT75A Service Manual

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CHARGING SYSTEM TROUBLESHOOTING
BATTERY IS DAMAGED OR WEAK
1. Battery test
Remove the battery.
Check the battery condition using a commercially available battery tester.
Is the battery in good condition?
YES
NO
2. Fuse inspection
Check for blown fuse (70 A).
Is it normal?
YES
NO
3. Load inspection
Check whether an excessive load is connected.
Is the load normal?
YES
NO
4. Alternator stator inspection
Check the alternator stator (page 7-13).
Is it normal?
YES
NO
5. Regulator/rectifier inspection
Check the regulator/rectifier (page 7-13).
Is it normal?
YES
NO
– GO TO STEP 2.
– Faulty battery.
– GO TO STEP 3.
– Battery connected incorrectly or reverse polarity.
• Check for short in the main wire harness
• Incorrect load by referring to the fuse load chart (page 4-12)
• Replace the blown fuse
– GO TO STEP 4.
– Remove the load and recheck.
– GO TO STEP 5.
– Faulty alternator stator.
– Repair or replace the main wire harness.
– Faulty regulator/rectifier.
CHARGING SYSTEM
7-3