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.
Access/Start Authorization Button, Comfort System Central Control Module, Data Bus On Board Diagnostic Interface
E408
Access/Start Authorization Button
J393
Comfort System Central Control Module
J533
Data Bus on Board Diagnostic Interface
T6df
6-Pin Connector, Black
T17e
17-Pin Connector, Black
T17ex
17-Pin Connector, Black
T17p
17-Pin Connector, Black
T17px
17-Pin Connector, Black
T32h
32-Pin Connector, Blue
T54c
54-Pin Connector, Black
TARU
Coupling Point on Right A-Pillar, Bottom
TCPM
Coupling Point on Instrument Panel, Center
1321
Ground Connection 2 (in Center Console Wiring Harness)
B399
Comfort System CAN Bus High Connection 3 (in Main Wiring Harness)
B400
Comfort System CAN Bus High Connection 4 (in Main Wiring Harness)
B407
Comfort System CAN Bus Low Connection 2 (in Main Wiring Harness)
B408
Comfort System CAN Bus Low Connection 3 (in Main Wiring Harness)
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.