RADIATOR GP 3538997 - Caterpillar

Illustration 1 g01137388
Schematic for injection actuation pressure control valve
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01137477
Injection actuation pressure control valve and related components (1) Unit injector hydraulic pump (2) J2/P2 ECM connectors (3) Injection actuation pressure sensor (4) High pressure supply lines to cylinder heads (5) Low pressure supply line to pump (6) Injection actuation pressure control valve
Thoroughly inspect connector (1). Also inspect the connector for control valve (6). Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01137405
P2 ECM connector (P2-29) Injection actuation pressure control valve supply (P2-35) Injection actuation pressure control valve 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" for the correct torque values.
Check the harness and wiring for abrasion and 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 and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The connectors and the wiring appear to be in good repair. 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. Measure the Resistance of the Injection Actuation Pressure Control Valve's Solenoid
Turn the keyswitch to the OFF position.
Disconnect J46/P46 IAPCV connector.
Use a multimeter to measure the resistance between J46-1 IAPCV supply and J46-2 IAPCV return on the IAPCV. Record the value that was measured.Expected Result:The resistance is between 5 Ohms and 15 Ohms.Results:
OK - The resistance is between 5 Ohms and 15 Ohms. The control valve solenoid does not seem to have an open or a short. Connect the J46/P46 IAPCV connector. Proceed to Test Step 3.
Not OK - The control valve solenoid is open or shorted internally.Repair: Replace the IAPCV. Verify that the repair eliminates the problem.STOPTest Step 3. Measure the Resistance of the Solenoid Through the Engine Harness
Disconnect the J2/P2 ECM connector.
Measure the resistance between P2-29 (IAPCV supply) and P2-35 (IAPCV return).Expected Result:The resistance should be within two Ohms of the value that was measured in the previous step.Results:
OK - The resistance is within two Ohms of the value that was measured in the previous step. The solenoid harness and the connector are OK. There may be a problem with the ECM. Proceed to Test Step 4.
Not OK - The