This SPN 70 FMI 13 reference covers a Detroit DD Series missing J1939 park brake switch signal from source #1, #2, or #3. It is part of the DiagTechPro truck manuals library and preserves the original TruckFaultCodes.com Detroit fault-code library (Copyright 2017).
Official document details
| Brand | Detroit |
|---|---|
| Model coverage | Detroit DD Series (EPA 2007-current) engines; the same fault-code procedure is also filed under the Detroit Series 60 (DDEC VI, EPA 2007) group. |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | SPN 70 / FMI 13 |
| Source | TruckFaultCodes.com Detroit fault-code library (Copyright 2017) |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Missing park-brake signal overview
- Battery-voltage pre-checks
- CPC configuration review
- ServiceLink module diagnostics
Diagnostic steps in the SPN 70 FMI 13 document
The document has the technician check for a CPC battery-voltage code (SPN 168) before proceeding when only the J1939 error is present. It then confirms the CPC configuration after any reprogramming and connects ServiceLink to determine which modules are configured for the vehicle and their communication status, following the module-communication troubleshooting procedure for the affected module.
The J1939 park brake switch signal from source #1, #2, or #3 is missing condition on Detroit DD Series trucks is read and cleared with DiagnosticLink (formerly DDDL); the SPN and FMI pair identifies the exact circuit and failure mode. Confirm the code is active and capture freeze-frame data before running the pinpoint tests, then clear it and road-test the truck to verify the repair has held.
Applicable truck models and engines
This document applies to Detroit DD Series (EPA 2007-current) engines; the same fault-code procedure is also filed under the Detroit Series 60 (DDEC VI, EPA 2007) group. For factory service data, parts and warranty information, consult Detroit’s official DD engine support.
Who needs the SPN 70 FMI 13 manual
This page suits DD Series technicians whose park-brake status has dropped off the datalink rather than reading incorrectly.
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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