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.
2012 Lexus IS 350CFACTORY OEM SERVICE PROCEDURE
Service Data
| Starter assembly | Specified current | 90 A or less at 11.5 V | |
| Starter armature assembly | Standard resistance | Segment - Segment | Below 1 Ω |
| Commutator - Armature coil core | 10 kΩ or higher | ||
| Starter armature assembly | Standard length | 3.1 to 3.8 mm (0.122 to 0.149 in.) | |
| Maximum length | 3.8 mm (0.149 in.) | ||
| Brush length | Standard length | 4.0 to 9.0 mm (0.158 to 0.354 in.) | |
| Minimum length | 4.0 mm (0.158 in.) | ||
| Starter commutator end frame assembly | Standard resistance | Positive (+) brush - Negative (-) brush | 10 kΩ or higher |
| Repair service starter kit | Specified condition | Terminal 50 - Terminal C | Below 1 Ω |
| Terminal 50 - Switch body | Below 2 Ω | ||
| Snap ring | Maximum length | 5.0 mm (0.197 in.) | |
| Starter relay | Specified condition | 3 - 5 (Battery voltage is applied between terminals 1 and 2) |
Below 1 Ω |
| 3 - 5 (Battery voltage is not applied between terminals 1 and 2) |
10 kΩ or higher | ||
| Starter cut relay | Specified condition | 3 - 5 (Battery voltage is applied between terminals 1 and 2) |
Below 1 Ω |
| 3 - 5 (Battery voltage is not applied between terminals 1 and 2) |
10 kΩ or higher | ||
| Engine switch | 7 (SS1) - 5 (GND) / 2 (SS2) - 5 (GND) Specified resistance Not pushed: 10kΩ or higher Pushed: 15 Ω |
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| Standard condition: Illuminates Measurement condition Battery positive 11 (SWIL) - Battery negative 4 (COM) or 5 (GND) Battery positive 12 (INDS) - Battery negative 4 (COM) or 5 (GND) Battery positive 13 (INDW) - Battery negative 4 (COM) or 5 (GND) |
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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.
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