This Detroit coolant signal missing reference documents fault code SPN 110/FMI 9 (Coolant Temperature Signal Not Available) for Detroit DD-series engines on the GHG14 platform. It reproduces the original TruckFaultCodes.com fault tree, from the first check through the final repair, so the code can be confirmed and worked in the exact order the factory intended. Each step lists the measured value or check and the pass or fail branch that follows, matching the layout used in the source document.
Detroit coolant signal missing troubleshooting overview
The GHG14 sheet covers a coolant temperature value that is not being received. After a reprogramming check it has the technician cycle the ignition, wait five minutes for modules to power down, reconnect the diagnostic tool and re-read codes. If the fault stays active it points to the SPN 625/FMI 9 PT CAN procedure in Power Service Literature. Follow the checks in sequence and verify the repair before clearing the code and releasing the vehicle.
Official document details
| Brand | Detroit |
| Model coverage | Detroit DD-series engines on the GHG14 platform |
| System / group | DTCs — coolant temperature CAN signal |
| Fault code | SPN 110/FMI 9 |
| Source publication | TruckFaultCodes.com (© 2017) |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification — SPN 110/FMI 9
- Monitored parameter and 10-second duration
- Reprogramming check (ACM2.1, MCM2.1, CPC4)
- Module power-down and diagnostic-tool reconnect
- Redirect to SPN 625/FMI 9 PT CAN troubleshooting
Applicable truck models
It applies to Detroit DD-series engines on the GHG14 platform with ACM2.1, MCM2.1 and CPC4 modules on the PT CAN. Always cross-check the reading against any companion codes before condemning a component. For the official product and service literature, visit the Detroit Diesel website.
Who needs this Detroit coolant signal missing manual
Technicians facing a missing coolant signal who need to know when to move from the sensor to the PT CAN network. It is written for shop use as a quick, printable reference to keep beside a diesel diagnostic tool during the job.
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