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.
Towing Recognition Control Module -J345-: Notes
General Description:
The Towing Recognition Control Module -J345- Recognizes "Trailer Mode" When There Is A Power Decrease Of At Least 5 W (Refer To -Item 1) And Transmits This Information To Various Control Modules Via The Can Data Bus.
The Vehicle Electrical System Control Module -J519- And The Comfort System Central Control Module -J393- Supply The Towing Recognition Control Module -J519- With Information Via The Can Data Bus.
For Information On Testing Control Modules, Diagnosing Malfunctions, Malfunction Indicators And Fault Finding. Refer To the appropriate service information .
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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.