TROUBLESHOOTING 120 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION 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 repair facility 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.