| Fault Code | Possible cause | Action |
| P0500 | Vehicle speed sensor circuit fault | View & note «freeze frame» data if available. View & note «sensor» data. Ensure sensor connector is secure. Disconnect ECM and proceed to pinpoint test 1 |
Pinpoint tests
| Test | Result | Action |
| 1 Check cable and terminal integrity: - ECM pin A21 - Instrument pin 18 | OK | Disconnect ambient pressure sensor and proceed to test 2 |
| Faulty | Rectify fault, proceed to test 4 | |
| 2 Check cable for short circuit: - ECM pin A21 to ground - ECM pin A21 to ECM pin A01 - ECM pin A21 to battery | OK | Proceed to test 3 |
| Faulty | Locate and rectify wiring fault, proceed to test 4 | |
| 3 Check cable for continuity: - ECM pin A21 to sensor pin 3 - Sensor pin 2 to ground - Instruments pin 18 to sensor pin 1 | OK | Renew vehicle speed sensor and proceed to test 4 |
| Open circuit | Locate and rectify wiring fault, proceed to test 4 | |
| 4 Reconnect harness, clear fault code and run engine. | OK | Action complete, quit test |
| Fault still present | Contact Triumph service |
Circuit diagram
