Other C1214 Code Questions - What is SWbatt(v)?

[nmp27]

Posted in the wrong area yesterday... NooB here, with an some additional questions about this code, and help is GREATLY appreciated!!! I have a 02 Z with 20k miles This is the ONLY code it's presenting. I have searched thru the previous posts about this code checked connections/wires - lubed all connectors with dielectric grease. fuses are ok, tried the 30mph pedal stomp, hammer, etc. Hooking up to snap-on scan tool i checked the wheel sensors, they are all working OK, each reads properly, etc. The ONLY paramaters that did have any issues that i could tell were: SWbatt(v) was low (i'm not sure, but it's the input voltage that some part of the comuter sees, and mine was .5v and it was suppose to have a range of 12+v) Now i have proper igniton voltage, and have never had a voltage drop below 8, so i have that ruled out too. This code came up after mounting new wheels/tires, and i cleared/unhooked battery overnight, and it went away, which made me think to check all the connections. Then had it aligned about 4 days later, code came back, tried same procedure, and have put 1000+ miles on it this weekend, and no change since... I'm just making sure i have everything narrowed down before i replace the expensive part! If anyone has any other ideas OR knows what causes that SWbatt(v) to be low, PLEASE let me know Thanks in advance for ANY help!!! Also - have 02 grey z wheels for sale, will post in the correct area soon.