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
■ Check internal errors of CAN communication units.
- Connect GDS.
- IG "ON" and engine "OFF".
- Select "Diagnostic Trouble Codes (DTC)" mode.
- Disconnect CAN communication units one by one and monitor DTC to find the cause.
*CAN communication units: BCM (Body Control Module), DDM (Drive Door Module), ADM (Assist Door Module), DPSM (Drive Power Seat Module), APSM (Assist Power Seat Module), FSJB (Front Smart Junction Box), RSJB (Rear Smart Junction Box), SCM (Steering Column Module), MFSW (Multi-Function Switch Module), SWRC (Steering Wheel Remote Controller Module), ARS (Rear Armrest Switch Module), ILM (Interior Lamp Module), PTM (Power Trunk Lid Module), HUD (Head Up Display), SMK (Smart Key Module)
- Is the code erased?
YES
- Substitute with a known - good unit and check for proper operation.
If the problem is corrected, replace the unit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Substitute with a known - good unit and check for proper operation.
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.
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