DTC P1549: Charging System High Voltage

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
• If a high voltage battery (24 V, etc.) is connected to the vehicle, this DTC can be stored.

DTC (PGM-FI)

• 1. 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 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.