BATTERY SYSTEM DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
THE BATTERY SEEMS
WEAK OR DEAD WHEN
ATTEMPTING TO START
THE ENGINE.
1. The electrical system
ignition-off draw is excessive.
1. (Refer to 8 - ELECTRICAL/BATTERY
SYSTEM/BATTERY - STANDARD PROCEDURE
- IGNITION-OFF DRAW TEST) for the proper test
procedures. Repair the excessive ignition-off
draw, as required.
2. The charging system is
inoperative.
2. Determine if the charging system is performing
to specifications. Repair the inoperative charging
system, as required.
3. The battery is discharged.
3. Determine the battery state-of-charge using the
Micro 420 battery tester, (Refer to 8 -
ELECTRICAL/BATTERY SYSTEM/BATTERY -
STANDARD PROCEDURE - USING MICRO 420
BATTERY TESTER). Charge the inoperative
battery as required.
4. The battery terminal
connections are loose or
corroded.
4. (Refer to 8 - ELECTRICAL/BATTERY SYSTEM
- CLEANING). Clean and tighten the battery
terminal connections, as required.
5. The battery has an
incorrect size or rating for
this vehicle.
5. (Refer to 8 - ELECTRICAL/BATTERY SYSTEM
- SPECIFICATIONS) for the proper size and
rating. Replace an incorrect battery, as required.
6. The battery is inoperative.
6. Determine the battery cranking capacity using
the Micro 420 battery tester, (Refer to 8 -
ELECTRICAL/BATTERY SYSTEM/BATTERY -
STANDARD PROCEDURE - USING MICRO 420
BATTERY TESTER). Replace the inoperative
battery, as required.
7. The starting system is
inoperative.
7. Determine if the starting system is performing
to specifications. Repair the inoperative starting
system, as required.
8. The battery is physically
damaged.
8. Inspect the battery for loose terminal posts or a
cracked and leaking case. Replace the damaged
battery, as required.
8F - 4
BATTERY SYSTEM
DR/DH