Toyota Tundra 2005 Service - Repair - Maintenance page 2206

CH−10
Ohmmeter
Continuity
Ohmmeter
No Continuity
CHARGING (2UZ−FE) −
INSPECTION
1. INSPECT VOLTAGE REGULATOR
(a) Using an ohmmeter, check the continuity between termi-
nals F and B.
Standard:
When the positive and negative poles between termi-
nals F and B are exchanged, there is continuity in one
way but no continuity in another way.
B16396 If the continuity is not as specified, replace the regulator.
(b) Using an ohmmeter, check the continuity between termi-
nals F and E.
Standard:
When the positive and negative poles between termi-
nals F and E are exchanged, there is continuity in one
way but no continuity in another way.
If the continuity is not as specified, replace the regulator.
B16397
2. INSPECT ROTOR FOR OPEN CIRCUIT
(a) Check the rotor for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the slip rings.
Standard resistance: 2.1 to 2.5 Ω at 20°C (68°F)
If there is no continuity, replace the rotor.
CH0784
(b) Check the rotor for ground.
Using an ohmmeter, check that there is no continuity be-
tween the slip ring and rotor.
If there is continuity, replace the rotor.
B02105
(c) Check that the slip rings are not rough or scored.
If rough or scored, replace the rotor.
(d) Using vernier calipers, measure the slip ring diameters.
Standard diameter: 14.2 to 14.4 mm (0.559 to 0.567 in.)
Minimum diameter: 12.8 mm (0.504 in.)
If the diameter is less than minimum, replace the rotor.
CH1023
GENERATOR (Standard Spec.)
CH0LO−02