No Response From PCM (SCI Bus) - Powertrain

Tests 1 - 4:

Tests 5 - 9:

SYMPTOM
NO RESPONSE FROM PCM (SCI ONLY)

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