No Response From PCM (PCI Bus) - Powertrain

Tests 1 - 3:

Tests 4 - 6:

SYMPTOM
NO RESPONSE FROM PCM (PCI BUS)

POSSIBLE CAUSES
- Fused B(+) circuit less than 10.0 volts
- Fused ignition switch output circuit open
- PCM ground circuit(s) open
- PCM internal PCI bus open
- PCM PCI bus circuit open