DTC P1549
DTC P1549 : Charging System High Voltage
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information .
- If a high voltage battery (24 V, etc.) is connected to the vehicle, this DTC can be stored.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P1549 Charging System High Voltage |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Start the engine.
-4. Check under these conditions:
- A/C off
- Headlights off
- Rear window defogger off
-5. Hold the engine speed at 3000 RPM without load (in P or N) for 1 minute.
-6. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P1549 Charging System High Voltage Is DTC P1549 indicated?
YES
The failure is duplicated. Replace the alternator , then do the repair verification.
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.
- Repair verification (OBD STATUS check)
-1. Turn the vehicle to the ON mode.
-2. Reset the PCM with the HDS .
Reset PCM
-3. Do the PCM idle learn procedure .
-4. Start the engine.
-5. Check under these conditions:
- A/C off
- Headlights off
- Rear window defogger off
-6. Monitor the OBD STATUS for DTC P1549 in the DTCs MENU with the HDS.
DTC Description OBD Status P1549 Charging System High Voltage DTC (PGM-FI)
Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
PASSED
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
FAILED
Go to step 1 and recheck.
NOT COMPLETED
Meet the test conditions, and check the OBD STATUS again.