| Fault code No. | 39 | |
| Symptom | Open or short circuit of primary injector lead | |
| Fail-safe action | Engine startup: Possible (depending on the number of failed cylinders) | |
| Riding: Possible (depending on the number of failed cylinders) | ||
| Diagnostic monitoring code No. | D:36 D:37 D:38 D:39 | |
| D:36 | Actuator operation | Actuates the primary injector #1 five times at one-second intervals. Illuminates the engine trouble warning light. |
| Checking method | Check the operating sound of the primary injector #1 five times. | |
| D:37 | Actuator operation | Actuates the primary injector #2 five times at one-second intervals. Illuminates the engine trouble warning light. |
| Checking method | Check the operating sound of the primary injector #2 five times. | |
| D:38 | Actuator operation | Actuates the primary injector #3 five times at one-second intervals. Illuminates the engine trouble warning light. |
| Checking method | Check the operating sound of the primary injector #3 five times. | |
| D:39 | Actuator operation | Actuates the primary injector #4 five times at one-second intervals. Illuminates the engine trouble warning light. |
| Checking method | Check the operating sound of the primary injector #4 five times. | |
| Item/components and probable cause | Check or maintenance job | Sensor inspection procedure | |
| 1 | Locate the malfunction | Check in the diagnostic mode (Code No. 36, 37, 38, 39). Refer to "Checking the fuel injectors". | |
| 2 | Connection of primary injector coupler. Check the connection of the coupler is secure. Remove the coupler, and check each pin (for bending, wear, or locking). | Poor connection → Connect it securely, or repair/replace the wire harness. | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 3 | Primary injector malfunction | Refer to "Checking the fuel injectors". Fuel injection inspection method. | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 4 | Connection of main harness ECU coupler. Check the connection of the coupler is secure. Remove the coupler and check each pin (for bending, wear, or locking). | Poor connection → Connect it securely, or repair/replace the wire harness. | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 5 | Connection of sub-wire harness. Check the connection of the coupler is secure. Remove the coupler, and check each pin (for bending, wear, or locking) | Poor connection → Connect it securely, or repair/replace the wire harness. | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 6 | Continuity of wire harness | Open or short circuit → Replace the wire harness. Primary injector #1 Red/Blue-Red/Blue Red/Black-Red/Black Primary injector #2 Red/Blue-Red/Blue Green/Black-Green/Black Primary injector #3 Red/Blue-Red/Blue Blue/Black-Blue/Black Primary injector #4 Red/Blue-Red/Blue Orange/Black-Orange/Black | Place the main switch to the ON position, and check the fault code indication. No fault code indicated. → Recovered. Fault code indicated. → Check the next step. |
| 7 | ECU malfunction | Replace the ECU. |