DD15 Troubleshooting – Section 2.1 Discharged Battery

Section 2.1
Discharged Battery

Check as follows:‪

1. Bar the engine using the proper tool.
   1. If the engine rotates normally, go to the next step.
   2. If the engine does not rotate normally, refer to "2.6 Seized Accessory Drive Component" , “Seized Accessory Drive Components.”
2. Check all battery cables and connections. Reconnect or replace if necessary. If the engine fails to rotate, go to the next step.
3. Measure and record the voltage at the battery terminals; refer to OEM guidelines.
   1. If the voltage recorded is at recommended OEM specifications and the engine failed to rotate, check the magnetic switch; refer to "2.2 Defective Magnetic Switch" .
   2. If the voltage recorded is below OEM specifications and the engine failed to start, load test the batteries. Refer to OEM guidelines. If a battery fails the load test, go to the next step.

   Electrical Shock ‪
   To avoid injury from electrical shock, use care when connecting battery cables. The magnetic switch studs are at battery voltage.‪

   ELECTRICAL SHOCK ‪
   To avoid injury from electrical shock, follow OEM furnished operating instructions prior to usage.‪

4. Replace the battery according to OEM guidelines.

   ENGINE EXHAUST ‪
   To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

5. To determine if the new battery resolved the no start condition, attempt to start and run the engine.
   1. If the engine starts and runs, no further troubleshooting is required. Shut down the engine.
   2. If the engine fails to rotate, check the magnetic switch; refer to "2.2 Defective Magnetic Switch" .
   3. If the engine rotates but fails to start, refer to "3 Starting Difficulty – Engine Rotates" , “Starting Difficulty – Engine Rotates.”