TROUBLESHOOTING 44 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0055 04/08 Copyright © 2008 DETROIT DIESEL CORPORATION Problem - The Engine Will Not Crank Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The ignition switch is damaged. Replace the ignition switch. The battery cables are damaged and/or corroded. Replace the battery cables. The starter is damaged and/or worn. Have an authorized dealer replace the starter. The clutch or transmission is damaged. Bring the vehicle to an authorized dealer for service. There is internal damage to the engine. Bring the vehicle to an authorized dealer for service.
Problem—The Engine Turns Over Slowly Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The ignition switch is damaged. Replace the ignition switch. The battery cables are damaged and/or corroded Replace the battery cables. The starter is damaged and/or worn. Have an authorized dealer replace the starter. The engine oil does not meet the correct specifications. Change the engine oil, using the correct type of oil. The transmission fluid does not meet the correct specifications. Change the transmission fluid, using the correct type of fluid.