12 Volt Battery Symptom Troubleshooting - Low or Dead 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 high electrical loads such as headlight, seat heaters, wipers, rear window defogger, etc.
• When doing the following operation during the measurement of the parasitic draw, it may not be measured accurate:
• • With keyless access system: Approaching a vehicle with remote.
  • Locking or unlocking a door.

Indication Example 

*: The value that just before the vehicle in ON mode is shown. The value varies depending on when the vehicle in ON mode.

1. 1. 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

   Are DTCs P0562, P065A, and/or P16BB indicated?

   1. YES 

      Go to indicated DTCs troubleshooting.

      • DTC P0562
      • DTC P065A
      • DTC P16BB

      NO 

      Go to step 2.

2. 2. Parasitic draw check:

   - 1. Check all the BATTERY CONSUMPTION CURRENT HISTORY with the HDS.

   Battery Consumption Current History

   12 volt battery size	Threshold of the parasitic draw
   55B24	27.0 mA
   70D23	36.0 mA

   Are all the values less than the threshold?

   YES 

   Check the 12 volt battery .

   NO 

   Go to step 3.

3. 3. 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 transmitter or remote.

   - 4. Make sure the front individual map light is turned off and the security alarm system is armed.

   - 5. Wait 70 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

   12 volt battery size	Threshold of the parasitic draw
   55B24	27.0 mA
   70D23	36.0 mA

   Are all the values less than the threshold?

   1. 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 in the ACCESSORY mode.

      NO 

      Go to the parasitic draw check .