GEAR-SUN 3T3077 - Caterpillar

Table 1
Diagnostic Trouble Code for Battery Problem
J1939 Code CDL Code Description
(code descriptions may vary) Notes
168-31 E441 (1) Battery Potential / Power Input #1 The engine idle has been elevated in order to increase battery voltage.
This diagnostic code does not necessarily indicate a fault. This feature is used to increase an excessively low battery voltage while the engine is at idle. Probable Causes
Charging circuit
Batteries
Auxiliary deviceRecommended Actions
Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Charging Circuit
A. Check that the battery charging circuit is operating correctly. Refer to Troubleshooting, "Alternator Problem".
Charging circuit
Result: The charging circuit is not OK.
Repair: Repair the charging circuit, as necessary.
Result: The charging circuit is OK.
Proceed to Test Step 2.
2. Batteries
A. Verify that the battery or batteries are no longer able to hold a charge. Refer to Systems Operation/Testing and Adjusting, "Battery - Test".
Battery
Result: One of the batteries is not OK.
Repair: Replace the faulty battery. Refer to the Operation and Maintenance Manual.
Result: The battery or batteries are OK.
Proceed to Test Step 3.
3. Auxiliary Device
A. Check if an auxiliary device has drained the battery or batteries by being left in the ON position.
Auxiliary Device
Result: The battery or batteries have been drained by an auxiliary device being left in the ON position.
Repair: Charge the battery or batteries. Verify that the battery or batteries are able to maintain a charge. Refer to Systems Operation/Testing and Adjusting for the correct procedure.
Result: The battery or batteries have not been drained by an auxiliary device being left in the ON position.
Contact the Dealer Solutions Network (DSN).