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12 Volt Battery Symptom Troubleshooting - Low or dead 12 volt battery
Low or dead 12 volt battery
NOTE:
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A 12 volt battery might be discharged under these conditions: |
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Driving a vehicle 6 miles (10 km) or less per day. |
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Leaving a vehicle idling with high electrical loads such as headlight, seat heaters, wipers, rear window defogger, etc. |
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When doing the following operation during the measurement of the parasitic draw, it may not be measured accurate: |
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Approaching a vehicle with remote. |
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Locking or unlocking a door. | |
Indication Example
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? Latest History ? |
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Duration: 22 hours |
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Discharge: 300 mAh |
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Average current: 14 mA | |
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Data |
Value |
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Current immediately after IG OFF |
-3.82 A |
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Average current from immediately after IG OFF to 1 hour |
-990 mA |
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Average current from 1 hour to 2 hours |
-10 mA |
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Average current of 1 hour just before IG ON |
-10 mA | |
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1. |
PGM-FI system check:
PGM-FI system check
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?1. |
Check for PGM-FI DTCs.
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DTC Description |
Confirmed DTC |
Pending DTC |
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P0562 Charging System Low Voltage |
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P065A ACG No Charging Malfunction |
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P16BB Alternator B Terminal Circuit Low Voltage |
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Are DTCs P0562, P065A, and/or P16BB indicated?
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Go to indicated DTCs troubleshooting.? |
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2. |
Parasitic draw check:
Parasitic draw check
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?1. |
Check all the BATTERY CONSUMPTION CURRENT HISTORY with the HDS.
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12 volt battery size |
Threshold of the average current |
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L2,
LN2,
55B24 |
27.0 mA | |
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Are all the values of average current from 1 hour to 2 hours less than the threshold?
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3. |
Problem verification:
Problem verification
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?1. |
Turn the vehicle to the OFF (LOCK) mode. |
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?2. |
Get out of the vehicle, and close all doors and trunk securely. |
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Lock the doors with the keyless remote/transmitter. |
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?4. |
Make sure the individual map lights are turned off and the security alarm system is armed. |
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?5. |
Wait 130 minutes or more. |
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?6. |
Turn the vehicle to the ON mode. |
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?7. |
Check the latest BATTERY CONSUMPTION CURRENT HISTORY with the HDS.
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12 volt battery size |
Threshold of the average current |
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L2,
LN2,
55B24 |
27.0 mA | |
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Is the value of average current from 1 hour to 2 hours less than the threshold?
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Intermittent failure, the system is OK at this time.?
The possible cause could be that an incorrect parasitic draw value was recorded:
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A switch was not turned off. |
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The vehicle's accessories were operated for a long time with the vehicle ignition was in the ACCESSORY mode. | |
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