No Response From PCM (SCI Bus) - Powertrain

Tests 73 - 78:

Tests 79 - 81:

SYMPTOM
NO RESPONSE FROM PCM (SCI ONLY)

POSSIBLE CAUSES
- Ground circuit(s) open to data link connector
- "NO RESPONSE" displayed from DRB
- DRB adapter cable defective
- DRB defective
- SCI receive circuit open
- SCI receive circuit shorted to ground
- SCI transmit circuit open
- SCI transmit circuit shorted to ground
- PCM defective (no response)