12 Volt Battery Internal Resistance Reset: Procedure

NOTE:

At every engine startup, the PCM updates and records the internal resistance of a 12 volt battery. When the average of past internal resistance (multiple memories) exceeds a threshold value, the PCM judges the 12 volt battery deterioration.
The 12 volt battery cancel or the PCM reset does not clear the recorded internal resistance values of the 12 volt battery in the PCM.

HDS - Connect

12 Volt Battery Internal Resistance - Reset

1. Make sure all electrical items (the A/C, the audio, the lights, etc.) are off.

2. Turn the vehicle to the OFF (LOCK) mode.

3. Turn the vehicle to the ACCESSORY mode.

4. Turn the vehicle to the ON mode.

5. Start the engine, and let it idle for 1 minute or more.

6. Turn the vehicle to the OFF (LOCK) mode.

7. Repeat steps 3 through 6 four times or more.

NOTE: The internal resistance of a 12 volt battery may not be updated if the engine starts up immediately from the OFF (LOCK) mode without going through the ACCESSORY mode and ON mode.

8. Turn the vehicle to the ON mode.

9. Select the PGM-FI system with the HDS.

10. Check the IDLE STOP INHIBIT (BATTERY DETERIORATION) in the DATA LIST with the HDS.

Normal: The 12 volt battery internal resistance reset is complete.
INHIBITED: Replace the 12 Volt Battery - Removal and Installation , then do this 12 volt battery internal resistance reset procedure again.

11. Turn the vehicle to the OFF (LOCK) mode, and disconnect the HDS from the DLC.