KIT-SEAL 4248741 - Caterpillar

Illustration 9 g00846013
Schematic for direct fuel control
Illustration 10 g00858489
Current to PWM Converter
Turn the keyswitch to the OFF/RESET position.
Check the connectors and wiring for the following problems: damage, corrosion, abrasion and incorrect attachment. Pay close attention to the following areas:
J2/P2 ECM connector
J3/P3 Customer connector
Hardware for the Direct Fuel Control
Wiring for the Direct Fuel ControlRefer to Troubleshooting, "Electrical Connectors - Inspect" for more information.Expected Result:The connectors and wiring should be free of the following problems: damage, corrosion, abrasion and incorrect attachment.Results:
OK - Proceed to Test Step 12.
Not OK - Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.Clear all logged diagnostic codes. Stop.Test Step 12. Check the Voltage Supply to the Converter
Turn the keyswitch to the ON position.
Measure the voltage across pin 4 (+ Battery) and pin 6 (- Battery) of the converter.Expected Result:The voltage should be between 22 VDC and 27 VDC.Results:
OK - The converter is receiving the proper supply voltage. Proceed to Test Step 14.
Not OK - The converter is not receiving the proper supply voltage. Proceed to Test Step13.Test Step 13. Measure No-Load Battery Voltage
Measure the no-load battery voltage at the battery posts.Note: Load test the batteries by using the 4C-4911 Battery Load Tester. Refer to Special Instruction, SEHS9249, "Use of the 4C-4911 Battery Load Tester " and Special Instruction, SEHS7633, "Battery Test Procedure" for further assistance.Expected Result:The no-load voltage should be at least 11.0 VDC for a 12 Volt system and the no-load voltage should be at least 22.0 VDC for a 24 Volt system. The batteries should also pass the load test.Results:
OK - The battery is OK.Repair: There is a problem in the wiring between the battery and the converter. Inspect the wiring and repair the wiring. Stop.
Not OK - The battery is bad.Repair: Replace the battery. Verify that the repair eliminates the problem. Stop.Test Step 14. Check the Current Input to the Converter
Measure the current (mA) across pin 1 and pin 3 of the converter.
Move the throttle from the low idle position to the high idle position.Expected Result:The current is 0 mA at low idle and the current is 200 mA at high idle.Results:
OK - The converter is receiving the proper input. Proceed to Test Step 15.
Not OK - The converter is not receiving the proper input.Repair: Make sure that the governor is turned on. Check the wiring between the converter and the governor. Repair the wiring. Stop.Test Step 15. Measure the Duty Cycle at the Converter
Turn the keyswitch to the ON position.
Measure the duty cycle between pin 12 (Throttle Signal) and engine ground.
Move the throttle from the low idle position to the high idle position.Expected Result:The duty cycle should be between 5.0 percent and 10.0 percent when the throttle is at low idle. The duty cycle should be 90.0 percent to 95.0 percent when the throttle is at high idle.Results:
OK - The duty cycle is within the specified