MAINTENANCE WORK ON CHASSIS AND ENGINE 172
– To activate further ignition keys, repeat the last 4 steps with the respective ignition
key.
– Insert the orange programming key in the ignition lock.
– Switch on the ignition by turning the orange programming key to the position .
EFI warning lamp (MIL) lights up, switches off, and then starts to flash.
The immobilizer indicator lamp lights up, switches off briefly, and flashes
according to the number of functioning black ignition keys including the orange
programming key.
– Switch off the ignition by turning the orange programming key to the position .
– Pull out the orange programming key.
All black ignition keys are activated included in this job sequence are activated.
9.66Cooling system
400415-10
The water pump with a 3D water pump wheel in the engine ensures forced circulation of
the coolant. The heat exchanger enables faster warming of the engine oil at the start of a
journey and better heat dissipation for the engine oil during the journey.
The pressure in the cooling system resulting from heat is regulated by a valve in the radi-
ator cap . The heat expansion causes the surplus coolant to flow into the compensating
tank . When the temperature falls, this surplus coolant is sucked back into the cooling
system.
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