No Load Test
- Connect a test meter (09081-00010 alternator tester for models with special connector from regulator) as shown in illustrations. Start engine and increase speed to about 2000 RPM. Read "B" terminal voltage on models with external voltage regulator.
- On models with external voltage regulators, voltage should be 13.8-14.8 volts. On models with IC type voltage regulators, voltage should be 14.0-14.7 volts. On all models, current draw should be less than 10 amps.
- If voltage is not steady, dirty regulator points or defective connection at "F" terminal may be responsible. If voltage reading is too high, 1 of the following problems may be indicated: Regulator low speed gap too wide. High speed point gap too wide. High speed point gap resistance too high.
- Problem could also be due to open in regulator coil or voltage relay coil. Open circuit in regulator "N" terminal of "B" terminal. Low speed contact tension too heavy. Loose regulator ground connection. Faulty IC regulator.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002