DTC Troubleshooting: P1549
ElectronicCircuitSchematics-buttonADInfo-button DTC Advanced Diagnostics: P1549DTC P1549 : Charging System High Voltage
- Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems or How to Troubleshoot the Brake Booster Pressure Monitoring System .
- 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.
Check under these conditions:
- A/C off
- Headlights off
- Rear window defogger off
-5. Hold the engine speed at 3, 000 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.
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. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems or How to Troubleshoot the Brake Booster Pressure Monitoring System .