No Response From ECM and PCM

Tests 1 - 3:

Tests 4 - 8:

SYMPTOM
NO RESPONSE FROM ECM AND PCM (DIESEL ONLY)

POSSIBLE CAUSES
- Check ECM and PCM powers and grounds
- Powertrain control module - SCI transmit
- SCI transmit circuit shorted to voltage
- SCI circuits shorted together
- SCI transmit circuit shorted to ground
- SCI transmit circuit open
- Ground circuits at DLC open
- Engine control module