SPN 702 FMI 3 is the Detroit DD Series diagnostic fault code that identifies Top 2 Shift Solenoid – short to power on the pin 08 circuit of the CPC4 #3 connector. This DiagTechPro reference summarizes the official 1-page Detroit diagnostic sheet so a technician can confirm the condition before opening the truck, and it links to the full downloadable PDF.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD Series (EPA 2007-Current) diesel engines |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault condition | Top 2 Shift Solenoid – short to power on the pin 08 circuit of the CPC4 #3 connector |
| Published source | TruckFaultCodes.com, Copyright © 2017 |
| Pages | 1 |
| File size | 0.1 MB |
| Format | |
| Language | English |
SPN 702 FMI 3 diagnostic overview
This Detroit sheet reports a short to power on the pin 08 circuit of the CPC4 #3 connector for the Top 2 shift solenoid. Because the Common Powertrain Controller (CPC4) digital outputs share the same number as some Motor Control Module (MCM2.1) faults, the diesel diagnostic tool distinguishes the CPC4 output from the MCM2.1 fault before the repair. Wiring schematic information is referenced to Original Equipment Manufacturer (OEM) literature.
Document table of contents
- Fault code identification and description
- Note: CPC4 digital outputs versus MCM2.1 faults
- OEM wiring schematic reference
Applicable truck models covered
This diagnostic applies to Detroit DD Series (EPA 2007-Current) engines that use the CPC4 controller, and the same code is cross-listed under the Series 60 (DDEC VI – EPA 2007) DTC group. It targets the Top 2 shift solenoid output on the CPC4 #3 connector. For the OEM wiring schematics referenced in this procedure, see the official Detroit engine manufacturer site.
Who needs the SPN 702 FMI 3 manual
Workshop technicians and fleet owners using the diesel diagnostic tool to read Detroit fault codes and test the CPC4 #3 connector and Motor Control Module wiring will need this sheet. The full step-by-step PDF is available in the DiagTechPro manuals library, and a free account is required to download it.
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