Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

1994 Lexus SC 400FACTORY OEM SERVICE PROCEDURE

Repair and Diagnosis: Electrical: Starter: Overhaul

NOTE: Overhaul procedures are not available from manufacturer. See STARTER OVERHAUL SPECIFICATIONS table and Fig 1 .

STARTER OVERHAUL SPECIFICATIONS

Application

Specification

Brushes

Standard Length

.59" (15.0 mm)

Minimum Length

.35" (9.0 mm)

Brush Spring Tension

4.0-7.8 Lbs. (1.8-3.6 kg)

Commutator Diameter

Standard

1.38" (35.0 mm)

Minimum

1.34" (34.0 mm)

Commutator Mica Undercut ⁽¹⁾ (Minimum)

.008" (.20 mm)

Commutator Runout (Maximum)

.002" (.05 mm)

⁽¹⁾	Depth of groove between each segment of commutator.

Fig 1: Exploded View Of Starter Assembly (SC400)

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.