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ELECTRICAL
12
DIAGNOSTIC INFORMATION AND PROCEDURES FOR ALTERNATOR & BATTERY
CONDITION
POSSIBLE CAUSES
CORRECTION/REFERENCE ITEM
Battery
getting
discharged
Leakage current is high due to extra
accessories fitted on the vehicle.
Measure the leakage current. If it is
greater than 15mA, disconnect the idle
power consuming accessories.
Battery not getting
charged
1. Alternator belt loose
2. Battery terminals loose
3. Battery terminals corroded
4. Alternator voltage regulator setting
Wrong
5. Idle speed of engine too low
Tighten belt
Tighten the terminals
Clean the terminals
Check alternator output voltage. It
should be between 13.5 V and 14.5 V.
Otherwise replace the regulator with a
genuine spare.
Adjust engine idle speed