( TL19E30A14100012903FAAT00 )

Alternator and Regulator Circuit Troubleshooting

1. Be sure the battery connections are good, and that the battery is sufficiently charged and in good condition.

1. Hook up the following equipment:
   - Ammeter, 0−400 A
   - Voltmeter, 0−20 V (accurate within 0.1 V)

1. Start the engine. Hold the engine at 3,000 rpm (min −1 ) with no load (in N or P (A/T model) or neutral (M/T model)), until the radiator fan comes on then let it idle.

1. Raise the engine speed to 2,000 rpm (min −1 ) and hold it there.

1. Turn the headlights (high beam) on, and measure the voltage at the alternator terminal.

Is the voltage within 13.9−15.1 V?

YES | - | Go to Step 6 .
NO | - | Replace the alternator, or repair the alternator. ■

1. Read the amperage at 13.5 V.
   NOTE: Adjust the voltage by turning the blower motor, rear window defogger, brake lights and etc. on.

Is the amperage 87.5 A or more?

YES | - | The charging system is OK. Go to alternator control circuit troubleshooting. ■
NO | - | Replace the alternator, or repair the alternator. ■