Troubleshooting - BMW K 1100 LT/RS Repair Manual

Troubleshooting

Coolant temperature warning lamp lights
up.
no
Check coolant in expansion tank.
Is coolant level too low?
no
Check thermostat.
Is thermostat defective?
no
Check water pump.
Is water pump defective?
Fan motor does not switch on.
no
Check fuse F7.
Is fuse defective?
no
Check fan relay.
Is fan relay defective?
no
Check power circuit.
Does circuit have poor contact/break?
no
Check fan motor.
Is fan motor defective?
no
Check thermostat.
Thermostat does not open?
yes
Top up coolant.
yes
Replace thermostat.
yes
Repair/renew water pump.
yes
Renew fuse.
yes
Replace fan relay.
yes
Make contact/repair break.
yes
Repair/renew fan motor.
yes
Replace thermostat.
17.11