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.
DTC C1A01: Driving Support ECU: Procedure
- CHECK FOR DTC
- Clear the DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .
- Check for DTC. Refer to DTC CHECK / CLEAR [09/2012 - ]
.
OK
DTC C1A01 is not output.
NG → See step 3
OK → See step 2
- USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2012 - ]
- REPLACE DRIVING SUPPORT ECU. Refer to REMOVAL [09/2012 - ]
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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