Engine Starts & DRB Displays "No Response"

Tests 1 - 4:

Tests 5 - 7:

SYMPTOM
ENGINE STARTS & DRB DISPLAYS "NO RESPONSE"

POSSIBLE CAUSES
- DRB Adapter cable
- DRB
- PCM (no response)
- SCI Receive circuit open
- SCI Receive circuit shorted to ground
- SCI Transmit circuit open
- SCI Transmit circuit shorted to ground