Automotive Smog Check Tips
The wise Auto Technician checks TPMS Sensor tires before Rotating.
This might be Model Year 2003 and Newer, but especially 2007 and Newer.
Today is September 2017.
Example , if the tires need to be Rotated, the Sensors require Re-Programming
for their new location.
If a Tire Pressure Monitoring Sensor is defective, the tire rotatin procedure
should not be performed.
If a Tire Rotation is Approved, again ; the TPMS Sensors should be checked
before and after to make sure they are workin correctly before returning
the vehile to a Customer.
Automotive Principles Technology - James D. Halderman (1999 Edition)