Alternator and Regulator Circuit Troubleshooting

Alternator and Regulator Circuit Troubleshooting

Special Tools Required

- Alternator, Regulator, Battery, and Starter Tester OTC3131
*Available through the Honda Tool and Equipment Program 888-424-6857

1. Make sure the battery connections are good and the battery is sufficiently charged.

2. Connect the alternator, regulator, battery and starter tester (OTC3131) to the battery as shown.






3. Start the engine. Hold the engine speed at 3,000 rpm with no load (in N or P) until the radiator fan comes on, then let it idle.

4. Do the charging system test.

5. Raise the engine speed to 2,000 rpm, and hold it there.

Is the voltage within 13.5-15.1 V?

YES -

Go to step 6.

NO -

Based on the following symptoms, take the appropriate action:

- If the voltage less than 13.5 V, go to alternator control circuit troubleshooting.
- If the voltage over 15.1 V, go to replace the alternator Removal and Replacementor rear housing assembly Overhaul.

6. Check the alternator, regulator, battery and starter tester display.

Is the amperage 87.5 A or more?

YES -

The charging system is OK.�

NOTE: If the charging system indicator is still on, replace the alternator Removal and Replacement.

NO -

Replace the alternator Removal and Replacement or repair the alternator Overhaul.�