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
The Comfort System Central Control Module -J393- -arrow A- is located under the instrument panel inside the driver footwell.
GENERAL DESCRIPTION
Comfort System Central Control Module -J393- performs the following tasks in the vehicle:
- Sunroof control (issues enabling)
- Central locking system control
- Anti-theft warning system control
- Access/Start Authorization
- Light control
- Radio receiver
- Rear lid closing
- Comfort operation
Move the sunroof and roof screen into basic setting. Refer to COMFORT SYSTEM CENTRAL CONTROL MODULE -J393-, SUNROOF AND SUNSHADE BASIC SETTING .
Adapt the new Comfort System Central Control Module -J393- with the data set provided and deactivate the production/transport mode.
Comfort System Central Control Module -J393- replacing. Refer to COMFORT SYSTEM CENTRAL CONTROL MODULE -J393-, REPLACING .
Deactivate production mode. Refer to COMFORT SYSTEM CENTRAL CONTROL MODULE -J393-, DEACTIVATING PRODUCTION MODE
Malfunction Recognition and Malfunction Indicator
The Comfort System Central Control Module -J393- has on board diagnostic (OBD) capabilities which aids in troubleshooting.
The "Guided Fault Finding" function is to be used for troubleshooting of one of the systems described as in article "Vehicle Diagnosis, Testing and Information System". Refer to VEHICLE DIAGNOSTIC TESTER .
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.