Inspection [04/2013 - 08/2015]: Procedure
WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT GENERATOR PULLEY WITH CLUTCH
- Hold the center of the generator pulley with clutch, and check that the outer ring turns counterclockwise and does not turn clockwise.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 |
Free |
 |
Lock |
OK
The outer ring turns counterclockwise and does not turn clockwise.
If the result is not as specified, replace the generator pulley with clutch.
- INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
- Using a vernier caliper, measure the brush length.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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Standard Exposed Brush Length
9.5 to 11.5 mm (0.374 to 0.453 in.)
Minimum Exposed Brush Length
4.5 mm (0.177 in.)
If the brush length is less than the minimum, replace the generator brush holder assembly.
- INSPECT GENERATOR ROTOR ASSEMBLY
- Check the rotor for an open circuit.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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- Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Tester Connection |
Condition |
Specified Condition |
| Slip ring - Slip ring |
Approx. 20°C (68°F) |
1.5 to 1.9 Ω |
If the result is not as specified, replace the generator rotor assembly.
- Check if the rotor is grounded.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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- Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Tester Connection |
Specified Condition |
| Slip ring - Rotor |
10 MΩ or higher |
If the result is not as specified, replace the generator rotor assembly.
- Check that the generator rotor bearing is not rough or worn.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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OK
The bearing is not rough or worn.
If the result is not as specified, replace the generator rotor assembly.
- Check the slip ring diameter.
- Using a vernier caliper, measure the diameter of each slip ring.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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Standard Diameter
14.2 to 14.4 mm (0.559 to 0.567 in.)
Minimum Diameter
14.0 mm (0.551 in.)
If the diameter is less than the minimum, replace the generator rotor assembly.
- INSPECT GENERATOR DRIVE END FRAME BEARING
- Check that the generator drive end frame bearing is not rough or worn and that it rotates smoothly.
 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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OK
The bearing is not rough or worn and it rotates smoothly.
If the result is not as specified, replace the generator drive end frame bearing.