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.
Component Inspection
- Ignition "OFF" & Engine "OFF".
- Ignition "ON" & Engine "OFF".
- Connect GDS and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a GDS, Clear DTC.
- Using a GDS, Check DTC present.
- Are any DTCs present?
YES
This fault may be caused by an invalid CAN messages from SCC ECU.
Check if there is a problem in the SCC system side.
After repairing the fault of the SCC system side, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
This fault may be intermittently caused by poor connection in the SCC ECU or HECU connector or was repaired and HECU memory was not cleared. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.