DTC P1549: Charging System High Voltage Honda Pilot II

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION . If a high voltage battery (24 V, etc.) is connected to the vehicle, this DTC can be stored.

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check under these conditions: A/C switch off Headlights off Rear window defogger off
5. Hold the engine speed at 2, 000 rpm (in P or N) for 1 minute.
6. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1549 indicated? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-333547-S30059629692009072100000) ), then go to step 7 . NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box.
7. Turn the ignition switch to ON (II).
8. Reset the PCM with the HDS.
9. Do «PCM IDLE LEARN PROCEDURE»(ref-333561-S36442749152009072100000) .
10. Start the engine.
11. Check under these conditions: A/C switch off Headlights off Rear window defogger off
12. Hold the engine speed at 2, 000 rpm (in P or N) for 1 minute.
13. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1549 indicated? YES - Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO - Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.