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.
2006 Lexus IS 350FACTORY OEM SERVICE PROCEDURE
Cruise Control System DTCS
CRUISE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P0500 | Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor "A" Intermittent / Erratic / High |
| DTC P0571 | Brake Switch "A" Circuit |
| DTC P0607 | Control Module Performance |
| DTC P0500 | Vehicle Speed Sensor Malfunction; DTC P0503: Vehicle Speed Sensor "A" Intermittent / Erratic / High |
| DTC P0571 | Brake Switch "A" Circuit |
| DTC P0607 | Control Module Performance |
| DTC P1570 | Radar Sensor Malfunction |
| DTC P1572 | Improper Aiming of Radar Sensor Beam Axis |
| DTC P1575 | Warning Buzzer Malfunction |
| DTC P1578 | Brake System Malfunction |
| DTC P1615 | Communication Error from Distance Control ECU to ECM; DTC U1101: Lost Communication with Distance Control ECU |
| DTC P1616 | Communication Error from ECM to Distance Control ECU; DTC U0100: Lost Communication with ECM/PCM "A" |
| DTC P1617 | Distance Control ECU Malfunction |
| DTC P1630 | Communication Error from VSC to ECM; DTC U0122: Lost Communication with Vehicle Dynamics Control Module |
| DTC P1631 | Communication Error from ECM to VSC; DTC U0100: Lost Communication with ECM/PCM "A" |
| DTC U0123 | Communication Error of Yaw Rate Sensor |
| DTC U0126 | Lost Communication with Steering Angle Sensor Module |
| DTC U0235 | Lost Communication with Cruise Control Front Distance Range Sensor |
| DTC U1102 | Lost Communication with Radar Sensor |
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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