Sequoia LTD 4WD V8-4.7L (2UZ-FE) (2001)
Alternator: Testing and Inspection
INSPECTION
1. INSPECT ROTOR FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the slip rings.
Standard resistance: 2.1 - 2.5 ohms at 20°C (68°F)
If there is no continuity, replace the rotor.
2. INSPECT ROTOR FOR GROUND
Using an ohmmeter, check that there is no continuity between the slip ring and rotor.
If there is continuity, replace the rotor.
3. INSPECT SLIP RINGS
a. Check that the slip rings are not rough or scored.
If rough or scored, replace the rotor.
b. Using vernier calipers, measure the slip ring diameter.
Diameter:
If the diameter is less than minimum, replace the rotor.