When diagnosing a “Cranks but won’t start” symptom on a PFI engine, a technician finds that there is no injector pulse from the PCM. Which of the following problems could cause this? A. The IAT sensor...

When diagnosing a “Cranks but won’t start” symptom on a PFI engine, a technician finds that there is no injector pulse from the PCM. Which of the following problems could cause this?

A. The IAT sensor circuit is open, resulting in a 5 V signal to the PCM.

B. The REF signal from the distributor’s pickup coil or CKP sensor has been lost.

C. The ECT sensor circuit is open, resulting in a 5 V signal to the PCM.

D. The fuel pump relay is defective.