2006 models do not have a Front Module, only 05 models have that module.
I would suggest fixing the ABS wheel speed sensor before anything else, it could be causing the issue.
See Group 8W- Section 56- Page 2 In the 2006 Factory Service Manual for the wiring for the Steering Angle Sensor.
Sensor-Steering Angle . . . . . . . . . . . . . . . . 8W-56-2
It communicates with the Body Control Module via the Can C bus. So if you are having communication problems with the Can C Bus, that could also be part of the problem.
There are some troubleshooting guides and wiring diagrams in the FSM.
Link to the online Manuals:>
Index of /manuals/Jeep/KJLink for 2006 Jeep CRD FSM:>
2006-KJ-SM.pdf
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