This SPN 3606 FMI 9 document is a Detroit DD Series fault-code procedure for a missing J1939 ESS message on GHG14 engines. It routes the technician through battery-voltage codes, the Controller Area Network line, and CPC4 configuration.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD Series (EPA 2007-Current) |
| System / group | DD Series / DTCs |
| SPN | 3606 |
| FMI | 9 |
| Condition | J1939 ESS message is missing |
| Emissions level | GHG14 |
| Source | Detroit Power Service Literature |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
SPN 3606 FMI 9 troubleshooting steps
The procedure first checks for CPC4 battery-voltage codes SPN 168/FMI 0 or SPN 168/FMI 14, which must be repaired first, then for SPN 625/FMI 9, which points to a Controller Area Network fault. If only a J1939 error is present, it asks whether the Common Powertrain Controller was recently reprogrammed and directs you to confirm the CPC4 configuration or use ServiceLink to review module communication status.
- Fault description: J1939 ESS message is missing
- Step 1.1 – Check for battery-voltage codes (SPN 168/FMI 0 or 14)
- Step 1.2 – Check for SPN 625/FMI 9 CAN line fault
- Step 2 – Confirm CPC4 configuration after reprogramming
- ServiceLink review of module communication status
Applicable truck models
This fault code applies to Detroit DD Series GHG14 diesel engines that use a Common Powertrain Controller and the J1939 vehicle network. Configuration is confirmed with ServiceLink; cross-check the module list and network layout against Detroit resources on the official Detroit Diesel website.
Who needs this SPN 3606 FMI 9 manual
Diesel technicians and workshop owners chasing intermittent network faults on GHG14 Detroit trucks use this document to separate a battery-voltage problem from a genuine Controller Area Network or configuration issue before swapping controllers. It is especially useful right after a module has been reflashed, when a missing message is often a configuration mismatch rather than a wiring failure.
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