lexus Workshop Repair Guides

Lexus Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 7654 > < Diagram Information and Instructions|Page 7652
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Alternator: Testing and Inspection

INSPECTION

1. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

a. Using a vernier caliper, measure the exposed brush length.

Standard length: 10.5 mm
Minimum length: 4.5 mm

If the exposed brush length is less than the minimum, replace the generator brush holder assembly.

2. INSPECT GENERATOR ROTOR ASSEMBLY

a. Bearing inspection

1. When rotating the bearing, check that the bearing does not become stuck and that there is no unusual noise.

If the bearing becomes stuck or there is unusual noise, replace the generator rotor assembly.

b. Measure resistance

1. Measure the resistance between the slip rings.

Standard resistance: 1.5 to 1.9 ohms

If not within the specified range, replace the generator rotor assembly.

Diagram Information and Instructions|Page 7654 > < Diagram Information and Instructions|Page 7652