No Response Condition From ECM (Diesel Engine Control)

For Diesel Engines Only

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 13:

SYMPTOM
NO RESPONSE CONDITION FROM ECM (DIESEL ENGINE CONTROL)

POSSIBLE CAUSES
- DRB adapter cable
- Fused ignition switch output circuit open
- ECM
- ECM ground circuit open
- SCI receive circuit open
- SCI receive circuit short to ground
- TRANS circuit short to receive
- DRB
- Fused B(+) circuit open
- SCI short to ground
- SCI transmit circuit open