| Source document | Controller | Fault pairs |
|---|---|---|
| 1200 Series marine auxiliary engines troubleshooting guide | Engine ECU | 66 |
| System | Fault pairs |
|---|---|
| Fuel | 31 |
| Engine | 9 |
| Air Intake | 7 |
| Electrical | 7 |
| Cooling | 6 |
| Lubrication | 6 |
| Fault family | Fault pairs |
|---|---|
| Injector Cylinder Circuit | 18 |
| Engine Oil Pressure Sensor | 6 |
| Engine Coolant Temperature Sensor | 5 |
| Fuel Rail / Common Rail Pressure | 5 |
| Fuel Temperature Sensor | 4 |
| Intake / Charge Air Temperature Sensor | 4 |
| Sensor Supply Voltage Circuit | 4 |
| Battery / System Voltage | 3 |
| Fuel Supply / Transfer Pump | 3 |
| Accelerator Pedal Position Sensor | 2 |
| FMI | Meaning | Fault pairs |
|---|---|---|
| 0 | Reading in-range but far too high | 3 |
| 1 | Reading in-range but far too low | 2 |
| 2 | Signal unstable, intermittent or implausible | 11 |
| 3 | Circuit voltage high / short to supply | 9 |
| 4 | Circuit voltage low / short to ground | 9 |
| 5 | Current too low; open circuit | 7 |
| 6 | Current too high; short to ground | 9 |
| 8 | Wrong frequency, pulse width or period | 2 |
| 11 | Fault detected, cause undetermined | 1 |
| 15 | Slightly above normal range | 4 |
| 16 | Moderately above normal range | 4 |
| 17 | Slightly below normal range | 1 |
| 18 | Moderately below normal range | 2 |
| 21 | Value has drifted downward over time | 2 |
29 distinct SPNs appear in these pairs, all of them standard SPNs whose meaning is the same on every make.
Rows for this OEM from the free sample. The dataset adds the ordered procedures for every pair, with cost and labour estimates where known and a part name where one is mapped.
| SPN | FMI | OEM code | Description | Fault family |
|---|---|---|---|---|
| 174 | 16 | 174-16 | Fuel temperature reading moderately above normal range | Fuel Temperature Sensor |