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 this vehicle. In general, the ECU controlled system is considered to be a very intricate system requiring high level of technical knowledge and expert skill to troubleshoot. The fact is, however, that if you proceed to inspect the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. These articles are designed through emphasis of the above standpoint to help service technicians perform an accurate and effective troubleshooting, and is compiled for the following major ECU controlled systems.
The troubleshooting procedure and how to make use of it are described. in articles listed under description. See DESCRIPTION .
| System | Diagnostics |
|---|---|
| 1. SFI SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 2. SFI SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 3. ABS WITH EBD SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 4. ELECTRONIC CONTROLLED AUTOMATIC TRANSAXLE [ECT] (A246E) | HOW TO PROCEED WITH TROUBLESHOOTING |
| 5. ELECTRONIC CONTROLLED AUTOMATIC TRANSAXLE [ECT] (U341F) | HOW TO PROCEED WITH TROUBLESHOOTING |
| 6. SUPPLEMENTAL RESTRAINT SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 7. AUDIO SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 8. NAVIGATION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 9. COMBINATION METER | HOW TO PROCEED WITH TROUBLESHOOTING |
| 10. POWER DOOR LOCK CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 11. WIRELESS DOOR LOCK CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 12. VEHICLE INTRUSION PROTECTION SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
| 13. CRUISE CONTROL SYSTEM | HOW TO PROCEED WITH TROUBLESHOOTING |
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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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