12 Volt Battery - Low Or Dead 12 Volt Battery
NOTE:
- A 12 volt battery might be discharged under these conditions:
-
- Driving a vehicle 6 miles (10 km) or less per day.
- Leaving a vehicle idling with many high demand electrical loads on simultaneously such as headlights, seat heaters, wipers, rear window defogger, etc.
- Not driving the vehicle long enough to sufficiently recharge the battery.
- Leaving a vehicle in the ACCESSORY mode for prolonged periods of time with high demand electrical loads on such as the audio system, headlights, etc.
- When performing the following operations, the parasitic draw test may not be accurately measured when:
-
- Approaching a vehicle with a remote.
- Locking or unlocking a door.
Indication Example: HDS Screen (Consumption Current History)
| - Latest History - |
| Duration: 22 hours |
| Discharge: 300 mAh |
| Average current: 14 mA |
| Data | Value |
|---|---|
| Current immediately after IG OFF | -3.82 A |
| Average current from immediately after IG OFF to 1 hour | -990 mA |
| Average current from 1 hour to 2 hours | -10 mA |
| Average current of 1 hour just before IG ON | -10 mA |
- PGM-FI system check
-1. Check for PGM-FI DTCs.
DTC Description Confirmed DTC Pending DTC P0562 CHARGING SYSTEM LOW VOLTAGE P065A ACG NO CHARGING MALFUNCTION P16BB ALTERNATOR B TERMINAL CIRCUIT LOW VOLTAGE P16E7 PGM-FI-BATTERY FAN LIN COMMUNICATION ERROR Are DTCs P0562, P065A, P16BB and/or P16E7 indicated?
YES
Go to indicated DTCs troubleshooting - Refer to
Fuel and Emissions Systems DTC Troubleshooting Index (2016 2017 2018 2019 2020)
Fuel and Emissions Systems DTC (2021)
NO
Go to step 2.
- 12 volt battery fan motor check
-1. Test the 12 volt battery fan motor. Test
Is the 12 volt battery fan motor OK?
YES
Go to step 3.
NO
Replace the 12 Volt Battery Fan Motor - Removal and Installation .
- Parasitic draw check
-1. Check all the BATTERY CONSUMPTION CURRENT HISTORY with the HDS.
Battery Consumption Current History
Battery size Threshold of the average current L3 -27 mA Are all the values of average current from 1 hour to 2 hours less than the threshold?
YES
Check the 12 volt battery.
NO
Go to step 4.
- Problem verification
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Get out of the vehicle, and close all doors and tailgate securely.
- 3. Lock the doors with the keyless remote.
- 4. Make sure the individual map lights are turned off and the security alarm system is armed.
- 5. Wait 130 minutes or more.
- 6. Turn the vehicle to the ON mode.
- 7. Check the latest BATTERY CONSUMPTION CURRENT HISTORY with the HDS.
Battery Consumption Current History
Battery size Threshold of the average current L3 -27 mA Is the value of average current from 1 hour to 2 hours less than the threshold?
-
YES
Intermittent failure, the system is OK at this time. The possible cause could be that an incorrect parasitic draw value was recorded:
- A switch was not turned off.
- The vehicle's accessories were operated for a long time with the vehicle ignition was in the ACCESSORY mode.
- Wrong battery size or type is installed.
NO
Go to the Parasitic Draw Check .
-