Can a bad battery cause problems with the transmission computer chip? ie: Could it report the chip is bad but just needs a battery? I am in the computer business and I know here the lack of power causes my computers to malfunction and makes it hard to diagnose.Thanks for your help
Automotive computers need proper voltage at the battery in order to be properly tested or function properly. If your battery has 12v it is good enough to go ahead and test components. The system will "forgive" a slight deficit in power, but should not be tested without proper battery charge.
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The transmission controller is incorporated in the engine controller (same module). Power is supplied by the vehicle battery. There is no internal battery for the module, so when it is unplugged it resets to default settings losing any adaptive memory configurations. The system needs 12 volts to operate correctly. So if the vehicle battery has a bad cell, is weak, or can't maintain sufficent voltage during normal operations the vehicle can have some strange drivability effects. Less than 10 volts can make any module on the vehicle act "dumb". I hope this helps with your diagnosis.
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