WFS Errors: Troubleshooting and Solutions

Good evening, everyone.

I read out a seemingly pointless error code from the immobilizer today.
00546 Data line fault.
27-00: Implausible signal.

Does anyone have experience with this system and know what it means in plain language?
The car is a 1997 G3 with an AFN engine, and it starts perfectly fine despite this message.

It's not really important since the car is running, but it just bothers me.

Hello,

Sure, here is the translation:

"The following are some possible options:"

No signal or implausible signal detected on the W-line between the immobilizer control unit and the engine control unit.
=> Check the wiring for breaks or short circuits.


The baud rate of the immobilizer control unit is incorrect.
=> Code the control unit and enter the correct baud rate.


Misuse:
After the engine stopped, the ignition was immediately switched back on (during the after-run phase).
Turn off the ignition, wait at least 10 seconds, turn the ignition back on, and then check the error memory again.


Immobilizer control unit J362 is defective.