Fuel injectors — pinpoint tests (Triumph Rocket III)
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Contents: Pinpoint tests ↓ Circuit diagram ↓
| Fault Code | Possible cause | Action |
| P0201/02/03 | Injection system fault - Injector 1/2/3 - Misfire indicates open circuit - Flooding indicates short circuit | View & note diagnostic tool "freeze frame" data if available. Ensure relevant injector connector is secure. Disconnect ECM and proceed to pinpoint test 1 |
Pinpoint tests
| Test | Result | Action |
| 1 Check cable and terminal integrity: - ECM pin B05 - ECM pin B06 - ECM pin B17 | OK | Proceed to test 2 |
| Faulty | Rectify fault, proceed to test 7 | |
| 2 Check resistance value: - ECM pin A20 to ECM pin B05 (injector 1) - ECM pin A20 to ECM pin B06 (injector 2) - ECM pin A20 to ECM pin B17 (injector 3) | 12.5Ω to 14.0Ω | Proceed to test 3 |
| Open circuit | Disconnect relevant injector and proceed to test 4 | |
| Short circuit | Disconnect relevant injector and proceed to test 5 | |
| 3 Check cable for short circuit to ground: - ECM pin B05 to earth - ECM pin B06 to earth - ECM pin B17 to earth | OK | Proceed to test 7 |
| Short circuit | Locate and rectify wiring fault, proceed to test 7 | |
| 4 Check cable continuity: - ECM pin A20 to relevant injector pin 2 - ECM pin B05 to injector 1 pin 1 - ECM pin B06 to injector 2 pin 1 - ECM pin B17 to injector 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 to supply box: - ECM pin A20 to ECM pin B05 (inj 1) - ECM pin A20 to ECM pin B06 (inj 2) - ECM pin A20 to ECM pin B17 (inj 3) | OK | Proceed to test 6 |
| Short circuit | Locate and rectify wiring fault, proceed to test 7 | |
| 6 Check relevant injector resistance: - Injector pin 1 to injector pin 2 | 12.5Ω to 14.0Ω | Proceed to test 7 |
| Faulty | Renew relevant injector, 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
[The original is available on the website: MOTOINSTRUCTION.ru]
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This article has been reviewed: Serafim Sazonov
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