PUMP AS 1003038 - Caterpillar

Note: The following code may not be applicable for certain applications.
Table 1
Diagnostic Trouble Codes
J1939 Code Description
(Code descriptions may vary) Comments
168-31 Battery Potential / Power Input #1 The battery voltage is below 24.5 VDC for 5 minutes.
The engine speed is increased to 1000 rpm. The code is logged. Probable Causes
Charging circuit
Low battery engine elevated idleRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Charging Circuit
A. Inspect the battery and charging circuit. Refer to Systems Operation/Testing and Adjusting, "Electrical System" for additional information.
Charging circuit
Result: The charging circuit is operating properly.
Proceed to Test Step 2.
Result: The charging circuit is not operating properly.
Repair the charging system. Verify the repair.
2. Low Battery Engine Elevated Idle
A. This condition is normal operation. The engine idle speed will be elevated to 1000 rpm when all of the following conditions occur:
1. Low Battery Engine Elevated Idle is enabled.
2. A valid throttle position is present. The throttle position has not exceeded 25 percent of full throttle for 5 minutes.
3. The transmission is in neutral.
4. The parking brake is engaged.
5. A valid engine speed is present.
6. System battery voltage is below 24.5 VDC for 5 minutes.
Normal operation
Result: This condition is normal operation.
Return the unit to service.
Complete the procedure in the order in which the steps are listed.