The 625 FMI 13 EPA10 fault code manual documents the Detroit eCAN ID_1629 diagnostic-message-not-received fault on the EPA10 platform, with MCM 21-pin connector voltage and ground-resistance checks. This DiagTechPro library page summarizes the official Detroit troubleshooting sheet so technicians can confirm the eCAN ID_1629 Diagnostic Message Not Received This Ignition Cycle condition before opening the full PDF.
Official document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | DD Series (EPA 2007-Current) heavy-duty diesel engines, including DD13, DD15 and DD16 |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 625 / FMI 13 – eCAN ID_1629 Diagnostic Message Not Received This Ignition Cycle |
| Emissions platform | EPA10 / GHG14 |
| Pages | 3 |
| File size | 0.3 MB |
| Format | |
| Language | English |
625 FMI 13 EPA10 troubleshooting contents
The Detroit fault code sheet walks through these sections and diagnostic steps in order:
- Fault code identification (SPN 625, FMI 13)
- Check battery-voltage faults (SPN 168) first
- Disconnect the Motor Control Module (MCM) 21-pin connector
- Measure ignition/battery voltage at pins 7, 11, 12, 14 and 15 (less than 11.5 volts)
- Measure ground resistance at pins 5, 6, 8 and 9 (greater than 3 ohms)
- Restore voltage or battery ground as required
Because these Detroit sheets present pass and fail decision points rather than long narrative, technicians should record each measured value as they proceed and compare it against the limits shown before replacing any control module, harness or sensor.
Applicable truck models covered
This diagnostic applies to Detroit DD Series (EPA 2007-Current) engines built to the EPA10 / GHG14 emissions configuration, covering the DD13, DD15 and DD16 used in Freightliner and Western Star trucks. It references the Motor Control Module (MCM) and Common Powertrain Controller (CPC) that manage the affected circuit. Always confirm engine calibration against the official specification on the Detroit Diesel manufacturer website before condemning any component.
Who needs this 625 FMI 13 EPA10 manual
Heavy-duty truck technicians, fleet maintenance teams and workshop owners diagnosing this Detroit fault code use this sheet to follow the manufacturer procedure instead of guessing. The source sheet is published by TruckFaultCodes.com (Copyright 2017) and lists the Detroit Customer Support Center at 800-445-1980 for unresolved cases.
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