MBE 900 ENGINE 2007 OPERATOR'S GUIDE All information subject to change without notice. (Rev. 04/08) 121 DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION Problem—The Engine Cranks, But Won't Start Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The cranking speed is not set correctly. Bring the vehicle to an authorized repair facility for service. No intake air preheater is installed, and it is too cold to start without one. Install an intake air preheater. The intake air preheater is malfunctioning. Check the intake air preheater, and replace it, if necessary.
The camshaft position sensor (CMP) and/or the crank angle position sensor are out of adjustment. Push both sensors into their holes as far as they will go. If this does not solve the problem, Bring the vehicle to an authorized repair facility for service. The camshaft position sensor (CMP) and/or the crank angle position sensor are damaged. Bring the vehicle to an authorized repair facility for service. There is air in the fuel system. Check the fuel lines for leaks. Prime the fuel system and start the engine according to the instructions in the “How to Replace Fuel Filter”. The air filter is clogged. Clean or replace the air filter. The fuel filter is clogged. Replace the filter element.
The exhaust brake valve is malfunctioning. Have an authorized repair facility check the operation of the valve. The valves are not adjusted properly. Check the valve lash. There are other problems in the fuel system. Bring the vehicle to an authorized repair facility for service. Coolant level is too low. Check for leaks, add coolant to correct level.