Test point 17: Elimination:

Disconnect plug from control module, check for continuity with ohmmeter on Pin 2 and Pin 3, and on Pin 1 and Pin 3.
If a short circuit is found, check the sensor wires first.
If no fault is detected in the wire, replace lumbar adjustment.
Once the cause of the fault has been found and eliminated, actuate the lumbar adjustment switch. The text in the fault memory changes from present to not present if the cause of the fault has really been eliminated.
If the fault is still present, replace control module.