- Make sure the battery terminals are not loose or corroded. Check the fusible link for continuity.
- Inspect the drive belt for excessive wear. Check the drive belt tension. If necessary adjust the drive belt.
- Check the following fuses for continuity: ENGINE, CHARGE, IGN fuses.
- Visually check alternator wiring and listen for abnormal noises.
- Check that the discharge warning light comes ON when the ignition switch is turned ON . Start the engine. Check that the warning light goes out.
- Check the charging circuit WITHOUT A LOAD. Connect a battery/alternator tester according to the manufacturer's instructions.
- Check the charging circuit WITH A LOAD (turn on high beams and heater fan). Connect a battery/alternator tester according to the manufacturer's instructions.
- Replace the necessary parts. Recheck the charging system. The standard amperage with a load on the system should be 30 amps. If a battery is fully charged, sometimes the indication will be less than 30 amps.
REMOVAL & INSTALLATION
See Figures 1 through 10
Toyota installs different types of alternators on the Corolla models. One is the Delco and the other is Nippondenso. The Delco models are not to be disassembled. The Nippondenso models are built slightly different depending on the plant your vehicle was produced at; US or Canada. Find out which type your vehicle has before proceeding with disassembly.
- Disconnect the negative battery cable.
- Disconnect the electrical wiring from the alternator.
- Loosen the adjusting lock bolt (lower bolt) and pivot (upper) bolt. Remove the drive belt. It may be necessary to remove other belts for access.
Failure to disconnect the battery can cause personal injury and damage to the car. If a tool is accidentally shorted at the alternator, it can become hot enough to cause a serious burn. It may be necessary to remove the gravel shield and work from underneath the car in order to gain access to the alternator retaining bolts.