Best Answer: ECM, EMC, CPU, ECU, Engine Computer etc. Brain Box has never been used been used by the industry. Your Jeep uses a ECU or Electronic Control Unit ...
urine culture and sensitivity (C&S) a microscopic study of the urine culture performed to determine the presence of pathogenic bacteria in patients with suspected urinary tract infection.
The C line is there to test the test itself, whereas the T line is there to test your urine, and if the C, or guaranteed positive line is not there, then the test is not capable of turning the T line positive in any meaningful way.