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
- IG "OFF"
- IG "ON"
- After connecting GDS, check DTC on the scantool.
- Using GDS, Erase the DTCs.
- Using a GDS, Check DTC present.
- Is the same DTC shown?
YES
Substitute with a known-good SCC ECU and check for proper operation.
If problem is corrected, replace SCC ECU and then 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.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.