Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems 6th Edition by James Halderman

تمرين 6

Two technicians are diagnosing a poorly running engine. There are no diagnostic trouble codes. When the MAF sensor is unplugged, the engine runs better. Technician A says that this means that the MAF is supplying incorrect airflow information to the PCM. Technician B says that this indicates that the PCM is defective. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B