Alternator Performance Test
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools Required
Honda GR8 Battery Diagnostic Station with AST Module (12 Volt) MTRGR811ASTH*
*: Available through the Honda Tool and Equipment Program 888-424-6857.
- PGM-FI system DTC check
-1. Connect the HDS to the DLC .
-2. Check for PGM-FI system DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting.
NO
Go to step 2.
- Alternator Test
-1. Jump the SCS line with the HDS, and wait more than 1 minute.
NOTE: This step must be done to protect the PCM from damage.
-2. Test the alternator with the Honda GR8 battery diagnostic station with AST module (12 Volt).
NOTE: For setup, customization, and other available features, refer to the GR8 user's manual.
Is the result OK?
YES
Intermittent failure, the system is OK at this time.
NO