Technician A says that on the Thermactor system, the TAB valve is under the control of the PCM-controlled TAB solenoid and is used to direct air flow to the TAD valve or to atmosphere. Technician B...

Technician A says that on the Thermactor system, the TAB valve is under the control of the PCM-controlled TAB solenoid and is used to direct air flow to the TAD valve or to atmosphere. Technician B says that on the Thermactor system, the TAD valve is under the control of the PCM-controlled TAD solenoid and is used to direct air flow upstream to the exhaust manifold or downstream to the catalytic converter. Who is correct?

A. Technician A only

B. Technician B only

C. Both technicians

D. Neither technician