Honda Fit/Jazz - DTC Troubleshooting: N
DTC Troubleshooting: N
| DTC indicator N: | A Problem in the Blower Motor Circuit |
| 1. | Clear the DTC by turning the ignition switch OFF, and then ON (II). |
| 2. | Operate the climate control system in several modes. |
| 3. | Check for DTCs using the self-diagnostic. Is DTC N indicated? YES - Go to 4. NO - Intermittent failure, check for loose wires or poor connections on the blower motor circuit.n |
| 4. | Turn the ignition switch OFF. |
| 5. | Check the No. 5 (40A) fuse in the under-hood fuse/relay box, and the No. 10 (7.5A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to 6. NO - Replace the fuse(s), and recheck.n |
| 6. | Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire.  |
| 7. | Turn the ignition switch ON (II). Does the blower motor run? YES - Go to 8. NO - Go to 23. |
| 8. | Turn the ignition switch OFF. |
| 9. | Disconnect the jumper wire. |
| 10. | Disconnect the power transistor 4P connector. |
| 11. | Check for continuity between the No. 2 terminal of the power transistor 4P connector and body ground.  Is there continuity? YES - Go to 12. NO - Check for an open in the BLK wire between the power transistor and body ground. If the wire is OK, check for poor ground at G402.n |
| 12. | Connect the No. 2 and No. 4 terminals of the power transistor 4P connector with a jumper wire.  |
| 13. | Turn the ignition switch ON (II). Does the blower motor run at high speed? YES - Go to 14. NO - Repair open in the BLU/BLK wire between the power transistor and the blower motor.n |
| 14. | Turn the ignition switch OFF. |
| 15. | Disconnect the jumper wire. |
| 16. | Disconnect climate control unit connector. |
| 17. | Check for continuity between the No. 13 and No. 14 terminals of climate control unit 28P connector and body ground individually.  Is there continuity? YES - Repair any short to body ground in the wire(s) between the climate control unit and the power transistor.n NO - Go to 18. |
| 18. | Check for continuity between the following terminals of climate control unit 28P connector and power transistor 4P connector.
 Is there continuity? YES - Go to 19. NO - Repair any open in the wire(s) between the climate control unit and the power transistor.n |
| 19. | Start the engine. |
| 20. | Check for voltage between the No. 13 and No. 14 terminals of climate control unit 28P connector and body ground individually.  Is there 1 V or more? YES - Repair short to power in the wires.n NO - Go to 21. |
| 21. | Reconnect climate control unit 28P connector. |
| 23. | Disconnect the jumper wire. |
| 24. | Disconnect the blower motor 2P connector. |
| 25. | Measure the voltage between the No. 1 terminal of the blower motor 2P connector and body ground.  Is there battery voltage? YES - Replace the blower motor.n NO - Go to 26. |
| 26. | Turn the ignition switch OFF. |
| 28. | Measure the voltage between the No. 1 terminal of the blower motor relay 5P socket and body ground.  Is there battery voltage? YES - Go to 29. NO - Repair open in the wire between the No. 5 fuse in the under-hood fuse/relay box and the blower motor relay.n |
| 29. | Turn the ignition switch ON (II). |
| 30. | Measure the voltage between the No. 5 terminal of the blower motor relay 5P socket and body ground.  Is there battery voltage? YES - Go to 31. NO - Replace the under-dash fuse/relay box.n |
| 31. | Turn the ignition switch OFF. |
| 32. | Check for continuity between the No. 3 terminal of the blower motor relay 5P socket and body ground.  Is there continuity? YES - Repair open in the BLU/WHT wire between the blower motor relay and the blower motor.n NO - Check for an open in the wire between the blower motor relay and body ground. If the wire is OK, check for poor ground at G401.n |
