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.
2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE
Transmission Wire: Inspection
- INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)
- Measure the resistance of the transmission wire
Standard Resistance
STANDARD RESISTANCE SPECIFICATIONTester Connection ATF Temperature Specified Condition 8 (OIL) - 9 (E2) 10°C (50°F) 5.0 to 8 0 kΩ 8 (OIL) - 9 (E2) 25°C (77°F) 2 5 to 4.5 kΩ 8 (OIL) - 9 (E2) 110°C (230°F) 0.22 to 0.28 kΩ If the resistance is not within the specified range of any of the ATF temperatures shown in the table above, the driveability of the vehicle may decrease
- Measure the resistance of the transmission wire
Factory Service Tools
Use the Manual With the Right Hardware
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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.