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.
2007 Lexus IS 350FACTORY OEM SERVICE PROCEDURE
Transfer Case DTCS
4WD CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| C1241/94 | Low Power Supply Voltage |
| C1296/96 | ABS Malfunction |
| C1297/97 | Steering Angle Sensor |
| C1298/98 | Linear Solenoid Circuit |
| C1299/99 | Cancellation of 4WD Control |
| U0073/86 | Control Module Communication Bus OFF |
| U0100/85 | Lost Communication with ECM / PCM "A" |
| U0122/83 | Lost Communication with Vehicle Dynamics Control Module |
| U0126/84 | Lost Communication with Steering Angle Sensor Module |
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.
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