Detroit Diesel — DDEC Electronic Control Unit Installation
Installation · DDEC-ECU
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Position the spacers, DDEC-ECU control unit, and mounting bolts on the cylinder block as removed.
- Install the DDEC-ECU on the cylinder block; tighten mounting bolts to 15 N·m (11 lb·ft).
- Install the fuel heat exchanger on the DDEC-ECU; tighten mounting bolts to 8 N·m (6 lb·ft).
- Connect the vehicle wiring harness and lock the locking unit.
- Connect the engine wiring harness and rotate the safety latch upward to lock.
- If a new DDEC-ECU was installed, transfer the customer parameter list using minidiag2.
- Connect the batteries.
- Close the hood and check for normal operation.
Tools required
- minidiag2 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- DDEC-ECU mounting bolts: 15 N·m (11 lb·ft)
- Heat exchanger mounting bolts: 8 N·m (6 lb·ft)
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.