| DTC B1390: | Tailgate Closer Unit Malfunction |
| 1. | Clear the DTCs by selecting the DTCs MENU (DTCs) from the Honda PGM Tester or the HDS. |
| 2. | Close the tailgate fully, then operate the tailgate outer handle, for more than 10 seconds. Check the un-locking operation. Is there operation sound? YES - Go to 3. NO - Go to 4. |
| 3. | Check the DTCs by selecting the DTCs MENU (DTCs) from the Honda PGM Tester or the HDS. Is DTC B1390 indicated? YES - Go to 15. NO - Intermittent failure, the system is OK at this time.n |
| 4. | Cycle the ignition switch to OFF. |
| 5. | Open the tailgate fully with emergency lever of inner side of tailgate. |
| 6. | Disconnect power tailgate control unit connector A (26P). |
| 7. | Disconnect the tailgate closer unit 12P connector. |
| 8. | Check for continuity between the No. 13 terminal of power tailgate control unit connector A (26P) and the No. 1 terminal of the tailgate closer unit 12P connector, the No. 26 terminal of power tailgate control unit connector A (26P) and the No. 2 terminal of the tailgate closer unit 12P connector. Is there continuity? YES - Go to 9. NO - Repair an open in the RED/BLU (CLM+) or BLK/RED (CLM-) wire.n |
| 9. | Disconnect power tailgate control unit connector B (5P). |
| 10. | Check for voltage between the No. 1 terminal of power tailgate control unit connector B (5P) and body ground. Is there battery voltage? YES - Go to 11. NO - Go to 21. |
| 11. | Check for continuity between the No. 3 terminal of power tailgate control unit connector B (5P) and body Ground. Is there continuity? YES - Go to 12. NO - Repair an open in the BLK (PG2) wire or poor ground (G705).n |
| 12. | By using the screwdriver, close the latch in the tailgate. |
| 13. | Reconnect the tailgate closer unit 12P connector. |
| 14. | Connect battery positive (+) terminal to the No. 13 terminal of power tailgate control unit connector A (26P), and connect battery negative (-) terminal to the No. 26 terminal, operate the tailgate closer motor for close. (less than one second), then reverse connect and operate. Is there smooth rotation? YES - Faulty power tailgate control unit; replace it.n NO - Faulty tailgate closer motor; replace it.n |
| 15. | Check the DTCs by selecting the DTCs MENU (DTCs) from the Honda PGM Tester or the HDS. Is B1380, B1381, B1382, or B1384 display? YES - Go to DTC troubleshooting. NO - Go to 16. |
| 16. | Cycle the ignition switch to OFF. |
| 17. | Open the tailgate fully. |
| 18. | Check for continuity between the No. 20 terminal and the No. 14 terminal of the power tailgate control unit connector A (26P), and the No. 18 terminal and the No. 14 terminal. Is there continuity? YES - Faulty power tailgate control unit; replace it.n NO - Go to 19. |
| 19. | Disconnect the tailgate closer unit 12P connector. |
| 20. | Check for continuity between the No. 6 terminal and the No. 9 terminal of the tailgate closer unit 12P connector, and the No. 7 terminal and the No. 9 terminal. Is there continuity? YES - Repair an open in the BLU/RED (HALF) or the BLU/BLK (LATCH) wire between the power tailgate control unit and the tailgate closer unit.n NO - Faulty harf latch or full latch switch; replace the tailgate closer unit, or repair an open in the BLU/RED (HALF) or the BLU/BLK (LATCH) wire.n |
| 21. | Reconnect the tailgate closer unit 12P connector. |
| 22. | Check for continuity between the No. 13 and No. 26 terminals of power tailgate control unit connector A (26P) and body ground. Is there continuity? YES - Go to 23. NO - Go to 25. |
| 23. | Disconnect the tailgate closer unit 12P connector. |
| 24. | Check for continuity between the No. 13 and No. 26 terminals of power tailgate control unit connector A (26P) and body ground. Is there continuity? YES - Repair a short in the RED/BLU (CLM+) or the BLK/RED (CLM-) wire, or faulty tailgate closer motor; replace the tailgate closer unit.n NO - Repair a short in the RED/BLU (CLM+) or the BLK/RED (CLM-) wire between the power tailgate control unit and the tailgate closer unit.n |
| 25. | Disconnect the power tailgate control unit connector C (4P). |
| 26. | Check for continuity between the No. 3 terminal of power tailgate control unit connector C (4P) and body ground. Is there continuity? YES - Repair a short in the BRN/BLK (CLU+) wire.n NO - Repair an open in the WHT/YEL (VMP2) wire, or blown No. 41 (20A) fuse in the under-hood subfuse box.n |