The Detroit EGR actuator CAN3 document is a Detroit fault code reference that explains an Exhaust Gas Recirculation (EGR) actuator CAN3 communication error, published for DD Series engines under SPN 5588 FMI 9 (GHG14). It gives workshop technicians the diagnostic sequence used to confirm the condition and return the truck to service, sourced from Detroit Power Service Literature.
Official document details
| Brand | Detroit (Detroit Diesel) |
| Model coverage | DD Series (EPA 2007-Current) and Series 60 (DDEC VI) |
| System / Group | Diagnostic Trouble Codes (DTCs) |
| Fault code | SPN 5588 / FMI 9 |
| Emissions family | GHG14 |
| Pages | 3 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification — SPN 5588 / FMI 9
- Fault description
- EGR valve actuator harness checks
- MCM2.1 120-pin resistance measurements
- EGR valve actuator replacement by engine
Troubleshooting the Detroit EGR actuator CAN3 code
The technician repairs any other voltage codes first, then disconnects the EGR valve actuator harness and the MCM2.1 120-pin connector to measure resistance across the actuator pins and the wiring back to MCM2.1 pins 74 and 75. A coil reading between 55 and 65 ohms calls for actuator replacement, with separate Power Service Literature references for the DD13 and for the DD15 and DD16; a test MCM2.1 is used to confirm whether the module itself is at fault.
Applicable truck models and engines
This diagnostic sheet applies to Detroit DD Series diesel engines built to EPA 2007 through current emissions standards, and the covered fault also appears on Series 60 (DDEC VI) applications listed in the source. Confirm the exact engine family and calibration against the vehicle before making repairs, and cross-check the specifications on the official Demand Detroit website.
Who needs this Detroit EGR actuator CAN3 manual
Heavy-duty truck technicians, fleet maintenance staff and workshop owners diagnosing SPN 5588 FMI 9 with a diesel diagnostic tool will use this sheet to follow the correct steps rather than replacing parts by guesswork.
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