INDICATOR-FUEL FILTER CHANGE 3819064 - Caterpillar

Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01121264
Left side view (1) Connector for the IAPCV (2) J2/P2 connectors
Thoroughly inspect connectors (1) and (2). Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01121316
P2 terminations for the IAPCV (P2-10) Control (P2-20) Return
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the IAPCV.
Check the allen head screw on the ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Check the harness and wiring for abrasion and for pinch points from the IAPCV back to the ECM.Note: Ensure that the seal is installed on the harness connector for the injection actuation pressure control valve.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The connectors and the wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or the wiring.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.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Turn the keyswitch to the ON position.
Start the engine.
Observe the "Active Diagnostic" screen on Cat ET. Wait at least 15 seconds so that any codes may become active. Look for these codes:
42-05
42-06Expected Result:One of the above codes is active.Results:
Active code - One of the above codes is active. Proceed to Test Step 3.
No active codes - None of the above codes are active.Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Troubleshooting Without a Diagnostic Code".If the engine is running properly at this time, there may be an intermittent problem in a harness that is causing the codes to be logged. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 3. Measure the Resistance of the Injection Actuation Pressure Control Valve's Solenoid
Turn the keyswitch to the OFF position.
Disconnect the J204/P204 connectors.Note: Ensure that the seal on the P204 connector remains on the connector when the connector is disconnected.
Measure the resistance between terminals P204-1 (Control) and P204-2 (Return) on the IAPCV. Record the value of the resistance measurement.Expected Result:The resistance measurement is between 6.5 and 10.5 Ohms.Results:
OK - The resistance measurement is between 6.5 and 10.5 Ohms. Connect the J204/P204 connectors. Proceed to Test Step 4.
Not OK - The resistance measurement is not between 6.5 and 10.5 Ohms. The solenoid's resistance is not within the specification.Repair: Replace the unit injector hydraulic pump. Verify that the problem is resolved.STOPTest Step 4. Check the Wiring for an Open Circuit
Turn the keyswitch to the OFF position.
Disconnect the J2/P2 connectors.
Measure the resistance between terminals J2-10 (Control) and J2-20 (Return).Expected Result:The resistance measurement is within two Ohms of the value