No Response Condition From ECM (Diesel ENG CTRL)

Tests 1452 - 1456:

Tests 1457 - 1461:

Tests 1462 - 1464:

SYMPTOM
NO RESPONSE COND FROM ECM (DIESEL ENG CTRL)

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