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.
General Information: Notes
A large number of ECU controlled systems are used in the SCION xA. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU controlled system's circuits one by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform effective trouble shooting, accurate diagnoses and necessary repairs. Detailed information and troubleshooting procedures on major ECU controlled systems in this vehicle are outlined below:
| System | Page |
|---|---|
| 1. SFI System | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. ABS With EBD System | PRECAUTION |
| 3. Electronically Controlled Automatic Transmission (ECT) | PRECAUTION |
| 4. Supplemental Restraint System | AIR BAG SAFETY PRECAUTIONS |
| 5. Combination Meter | HOW TO PROCEED WITH TROUBLESHOOTING |
| 6. Power Door Lock Control System | POWER DOOR LOCK CONTROL SYSTEM |
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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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