4.6. Other troubles Troubleshooting ENGINE (continued) *) Have this work performed by local dealer. 4-12 WA90-5 – VEAM270100 Fault Fault cause Remedy The background of the temperature display lights up in red and the acoustic warning signal sounds.
Engine is overheated Let the engine run idle without load, until the engine has sufficiently cooled down and the temperature indicator of the coolant has returned to the green range Tension of fan's drive belt too low Tension drive belt Internal surface of engine cooling system furred or dirty *) Clean internal surface of engine cooling system Radiator (radiator surfaces, fins) dirty Clean radiator (radiator surfaces, fins) Thermostat without function *) Check function of thermostat; replace defective thermostat Radiator cap either defective or loose Replace defective radiator cap; re- tighten loose radiator cap On the temperature display, the two LCD bars on the right are lit.
No contact to the temperature sensor, or the temperature sensor is defective. *) Check the contacts or replace the temperature sensor. Temperature display coolant:
with the engine at operating temperature, the temperature display coolant does not indicate a temperature Temperature display without function *) Check function of temperature display; replace defective temperature display Engine does not start Fuel tank empty Refill fuel and bleed fuel system Air in fuel system Bleed fuel system Injection pump or injection nozzles without function *) Replace injection pump or injection nozzles Starting speed too low See "Electrical System" Engine compression too low *) Check tappet clearance Exhaust fumes colour white or blue Oil level in engine too high Correct oil level Wrong fuel Use prescribed fuel Exhaust fumes colour temporarily black Air filter insert dirty Clean or replace air filter insert Injection nozzle defective *) Replace injection nozzles Engine compression too low *) Check tappet clearance Temporarily, combustion sounds like breathing Injection nozzles defective Replace injection nozzles*)