HOSE AS 9G2653 - Caterpillar

Event E043Conditions Which Generate This Code:The Electronic Control Module (ECM) detects supply voltage that is below 20 VDC. Information on default settings and ranges for this event can be found in Troubleshooting, "Event Codes".System Response:The event is logged.Possible Performance Effect:NoneTroubleshooting:
There may be a problem with the batteries.
There may be a problem with the electrical connections.Test Step 1. Check for "ACTIVE" Diagnostic Codes.
Start the Caterpillar Electronic Technician (ET).
Turn the main power to the ON position.
Check for any active diagnostic codes or logged diagnostic codes. Expected Result:No diagnostic codes are present.Results:
OK - No diagnostic codes are present. Proceed to Test Step 2.
Not OK - Diagnostic codes are present.Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual. Ensure that the repair eliminates the problem.STOPTest Step 2. Perform a Check of the Batteries.
Measure no-load voltage at the battery posts. Refer to the Testing and Adjusting manual for the proper procedures to check the batteries.
Load test the batteries. Use the 4C-4911 Battery Load Tester. Refer to the Operating Manual, SEHS9249. Refer to Special Instruction, SEHS7633. Expected Result:The no-load voltage at the batteries should be at least 23.5 VDC, and the batteries should pass the load test.Results:
OK - The no-load voltage at the batteries is at least 23.5 VDC, and the batteries pass the load test. There may be an intermittent problem.Repair: Monitor the operation of the engine. Repair the problem. Ensure that the repair eliminates the problem.STOP
Not OK - The no-load voltage at the batteries is less than 23.5 VDC, and/or the batteries fail the load test.Repair: The batteries or the alternator are causing the problem. Recharge the batteries or replace the batteries. Verify that the original condition is resolved. Refer to the Testing and Adjusting manual for information on the charging system.STOP