Ignition coils — pinpoint tests (Triumph Rocket III)
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Contents: Pinpoint tests ↓ Circuit diagram ↓
| Fault Code | Possible cause | Action |
| P0351/52/53 | Ignition system fault - Ign coil 1/2/3 | View & note diagnostic tool "freeze frame" data if available. Ensure relevant ign coil connector is secure. Disconnect ECM and proceed to pinpoint test 1 |
Pinpoint tests
| Test | Result | Action |
| 1 Check cable and terminal integrity: - ECM pin B29 - ECM pin B26 - ECM pin B01 | OK | Proceed to test 2 |
| Faulty | Rectify fault, proceed to test 7 | |
| 2 Check resistance value: ECM pin A20 to - ECM pin (ign coil 1) B29 - ECM pin (ign coil 2) B26 - ECM pin (ign coil 3) B01 | 1.4Ω to 1.8Ω | Proceed to test 3 |
| Open circuit | Disconnect relevant ignition coil and proceed to test 4 | |
| Short circuit | Disconnect relevant ignition coil and proceed to test 5 | |
| 3 Check cable for short circuit: - ECM pin to earth B29 - ECM pin to earth B26 - ECM pin to earth B01 | OK | Proceed to test 7 |
| Short circuit | Locate and rectify wiring fault, proceed to test 7 | |
| 4 Check cable continuity: Power latch relay pin 8 to any ign coil pin 2 - ECM pin B29 to ign coil 1 pin 1 - ECM pin B26 to ign coil 2 pin 1 - ECM pin BOI to ign coil 3 pin 1 | OK | Proceed to test 6 |
| Open circuit | Locate and rectify wiring fault, proceed to test 7 | |
| 5 Check cable for short circuit: ECM pin A20 to - ECM pin (ign coil 1) B29 - ECM pin (ign coil 2) B26 - ECM pin (ign coil 3) B01 | OK | Proceed to test 8 |
| Short circuit | Locate and rectify wiring fault, proceed to test 7 | |
| 6 Check relevant ign coil resistance: - Ign coil pin 1 to ign coil pin 2 | 1,4Ω to 1.8Ω | Proceed to test 7 |
| Faulty | Renew relevant ignition coil, proceed to test 7 | |
| 7 Reconnect harness, clear fault code and run engine to verify fault cleared | OK | Action complete - quit test |
| Fault still present | Contact Triumph service |
Circuit diagram
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This article has been reviewed: Serafim Sazonov
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