During diagnosis of an ATC system a trouble code is obtained that references the blend door feedback sensor. Tech A sasy the sensor should be replaced. Tech B says the sensor circuit should be tested. Who is right?
B. Fault codes usually only indicate which circuit the problem is in; they don't necessarily indicate which component in the circuit has failed. The problem could be caused by a loose connection, improper modification, or a broken wire, so perform a thorough inspection when diagnosing a malfunction. Ensure that all grounds are clean and making good contact. If basic mechanical and electrical checks fail to locate the problem, follow manufacturer electronic system test procedures.