824784 Volvo.Penta Spring washer

Illustration 1 g01157164
Schematic for the injection actuation pressure control valve
Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove power from the ECM.
Illustration 2 g01182300
Left side engine view (typical component locations)
(1) Injection Actuation Pressure Control Valve (IAPCV)
(2) Injection actuation pressure sensor
(3) J2/P2 ECM connector
(4) Pressure fitting for high pressure oil supply
(5) Line for low pressure return oil
Thoroughly inspect the connectors for sensors (1) and (2). Also, thoroughly inspect connectors (3). Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01151730
P2 terminations for the IAPCV
(P2-61) IAP control valve
(P2-62) 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 each ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque value.
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 appear to be 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".
Restore power to the ECM.
Start the engine.
Observe the "Active Diagnostic" screen on Cat ET. Wait at least 30 seconds so that any codes may become active. Look for a 42-11 diagnostic code that is active. Expected Result:There is an active 42-11.Results:
Active code - The code is active. There is a problem in the circuit for the IAPCV. Proceed to Test Step 3.
No active codes - The code is not active.Repair: If the above code is 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 Solenoid for the Injection Actuation Pressure Control Valve
Remove power from the ECM.
Disconnect the J500/P500 connectors. Note: Ensure that the seal on the P500 connector remains on the connector when the connector is disconnected.
Measure the resistance between terminals P500-1 (IAPCV signal) and P500-2 (IAPCV 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 J500/P500 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 solenoid. Verify that the problem is resolved.STOPTest Step 4. Check the Harness for an Open Circuit
Remove power from the ECM.
Disconnect the J2/P2 ECM connector.
Measure the resistance between terminals P2-61 (IAPCV signal) and P2-62 (IAPCV return). Expected Result:The resistance measurement is within two Ohms of the value that was measured in the previous test step.Results:
OK - The resistance measurement is within two Ohms of the value that was measured in the previous test step. Proceed to Test Step 5.
Not OK - The resistance measurement is not within two Ohms of the value that was measured in the previous test step.Repair: There is a problem with the wiring harness. There may be a problem with a connector. Repair the wiring and/or the connector. Replace parts, if necessary. Verify that the problem is resolved.STOPTest Step 5. Check the Wiring for a Short Circuit
Disconnect the J500/P500 connectors. Note: Ensure that the seal on the P500 connector remains on the connector when the connector is disconnected.
Disconnect the P1 connector.
Measure the resistance between the points that are listed in Table 1. Be sure to wiggle the wires in the harnesses as you make each resistance measurement.
Table 1
Resistance Measurements for the Wiring Harness
Connector and Terminal Terminal
P2-61 (IAPCV signal) All of the other terminals on the P2 connector
All of the terminals on the P1 connector
Engine ground stud
P2-62 (IAPCV Return) All of the other terminals on the P2 connector
All of the terminals on the P1 connector
Engine ground stud Expected Result:All of the resistance measurements indicate an open circuit.Results:
OK - All of the resistance measurements indicate an open circuit. There does not appear to be a short in the harness. Proceed to Test Step 6.
Not OK - At least one resistance measurement does not indicate an open circuit. There is a problem with a wiring harness. There may be a problem with a connector.Repair: Repair the wiring and/or the connector. Replace parts, if necessary. Verify that the problem is resolved.STOPTest Step 6. Check the ECM by using "Injection Act Press Driver Test"Note: This test step may activate additional diagnostic codes. Ignore the codes and monitor the test lamp. Clear th