BMW K 1100 LT/RS Repair Manual page 116

Acid density too low.
nein
Check charge status of battery.
Is battery discharged?
no
Check acid concentration.
Is acid concentration too low?
no
Check line network. Is there short-circuit in line
network?
no
Check alternator. Alternator does not charge
correctly?
Acid leak at plugs.
no
Check acid level.
Is acid level too high?
no
Check charging voltage.
Is charging voltage too high?
Excessive drop in terminal voltage
under load.
no
Check voltage at battery.
Is battery discharged?
no
Check charging voltage.
Is charging voltage too low?
yes
Charge battery.
yes
Adjust acid concentration.
yes
Check electrical system.
yes
Check generator/regulator; replace if neces-
sary.
yes
Adjust acid level.
yes
Check regulator; replace if necessary.
yes
Charge battery.
yes
Check regulator; replace if necessary.
12.30