Inspection [08/2015 - ]: Procedure

INSPECT GENERATOR ROTOR ASSEMBLY

Check the generator rotor for an open circuit.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

FOR 130 A TYPE

Tester Connection	Condition	Specified Condition
Slip ring - Slip ring	20°C (68°F)	2.3 to 2.7 Ω

FOR 150 A TYPE

Tester Connection	Condition	Specified Condition
Slip ring - Slip ring	20°C (68°F)	1.5 to 1.9 Ω

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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Slip Ring

If the result is not as specified, replace the generator rotor assembly.

Check if the generator rotor is grounded.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
Slip ring - Rotor core	Always	10 kΩ or higher

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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*1	Slip Ring
*2	Rotor Core

If the result is not as specified, replace the generator rotor assembly.

Using a vernier caliper, measure the slip ring diameter.

Standard diameter

14.2 to 14.4 mm (0.559 to 0.567 in.)

Minimum diameter

14.0 mm (0.551 in.)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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Diameter

If the diameter is less than the minimum, replace the generator rotor assembly.

Check that the generator rotor bearing is not rough or worn.

If necessary, replace the generator rotor assembly.

INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

Using a vernier caliper, measure the brush length.

Standard exposed length

9.5 to 11.5 mm (0.374 to 0.453 in.)

Minimum exposed length

4.5 mm (0.177 in.)

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Length

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