Fault Code | Possible cause | Action |
P0656 | Accessory fuel level gauge circuit fault | Ensure fuel level gauge connector is secure. Disconnect ECM and proceed to pinpoint test 1 |
Pinpoint tests
Test | Result | Action |
1 Check cable and terminal integrity: - ECM pin A08 - Gauge pin 1 | OK | Disconnect gauge and proceed to test 2 |
Faulty | Rectify fault, proceed to test 4 | |
2 Check cable for short circuit: - ECM pin A08 to ground - ECM pin A08 to ECM pin A20 | OK | Proceed to test 3 |
Short circuit | Locate and rectify wiring fault, proceed to test 4 | |
3 Check cable continuity: - ECM pin A08 to gauge pin 1 - Gauge pin 2 to earth - Gauge pin 3 to alarm control unit pin 1 | OK | Renew gauge and proceed to test 4 |
Open circuit | Locate and rectify wiring fault, proceed to test 4 | |
4 Reconnect harness, clear fault code. | OK | Action complete, quit test |
Fault still present | Contact Triumph service |
Circuit diagram
![](https://motoinstruction.ru/img/triumph/7/114438.jpg)