PLUG 3P3080 - Caterpillar

Illustration 1 g00955788
Location of the IAPCV (typical example)
Illustration 2 g01158010
Schematic
Illustration 3 g01158018
ECM connector P2The following information is provided in order to better help the technician troubleshoot the system.42-05 - This code indicates that there is an open in the supply line and/or that there is a short to ground in the return line to the IAPCV. The ECM detects a low current in the circuit.42-06 - This code indicates that there is an external short to the +Battery in either the supply line or the return line to the IAPCV. There is also the possibility that the supply line is shorted to the engine ground. The ECM detects a high current in the circuit. The ECM latches both circuit drivers in the open position in order to prevent damage to the circuit.42-07 - This code indicates that the injection actuation pressure is not being controlled properly. There may be incorrect fluctuations in the amount of current flow.42-08 - This code indicates that there is a short between the supply and the return line to the IAPCV. The short could be in wiring of the circuit or in the IAPCV. The ECM initially detects a high current. The ECM then detects a low current. - Test Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect the J500/P500 connector for the IAPCV and inspect the J2/P2 ECM connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the IAPCV (J2/P2:61 and J2/P2:62).
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and pinch points from the sensors 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 harness wiring are okay. Proceed to Test Step 5.
Not OK - The connectors or the wiring are damaged.Repair: Perform the following 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 the Current to the IAPCV
Install a 224-9282 Adapter Cable As (Test) (Current) in series with the P500 connector. Reconnect the J500/P500 connector.
Connect an ammeter in series with the adapter cable. Set the multimeter on the lowest current range that is greater than one amp.
Turn the keyswitch to the START position.
Crank the engine and record the following data:________ Current reading from the ammeter
Turn the keyswitch to the OFF position.
Remove the 224-9282 Adapter Cable As (Test) (Current) that is in series with the P500 connector. Reconnect the J500/P500 connector.Expected Result: