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
- Make sure the battery connections are good and the battery is sufficiently charged.
- Connect the alternator, regulator, battery and starter tester (OTC3131) to the battery as shown.
- 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.
- Do the charging system test.
- 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 (see Alternator Control Circuit Troubleshooting - K24Z1 engine , Alternator Control Circuit Troubleshooting - K24Z6 engine ).
- If the voltage over 15.1 V, go to replace the alternator (see ALTERNATOR REMOVAL AND INSTALLATION ) or rear housing assembly (see ALTERNATOR OVERHAUL ).
- 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 (see ALTERNATOR REMOVAL AND INSTALLATION ).NO -Replace the alternator (see ALTERNATOR REMOVAL AND INSTALLATION ) or repair the alternator (see ALTERNATOR OVERHAUL ).