837129 Volvo.Penta End cover

Illustration 1 g01027829
Schematic
Test Step 1. Inspect Electrical Connectors and Wiring
Remove electrical power from the engine ECM.
Illustration 2 g01200372
Left side engine view (typical example)
(1) J2/P2 ECM connectors
Illustration 3 g01161069
Typical location of the fuel filter differential pressure switch
(2) Fuel filter differential pressure switch
Thoroughly inspect connector (1). Also, thoroughly inspect the connector for switch (2). Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 4 g01027831
P2 ECM connector
(P2-65) Fuel filter differential pressure switch
(P2-83) Common
Illustration 5 g01160725
Connector for the fuel filter differential pressure switch
(Terminal 1) Fuel filter differential pressure switch
(Terminal 2) Signal return
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector and the sensor connectors that are associated with the active diagnostic code.
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 abrasions and for pinch points from the sensors back to the ECM. 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 harness and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or 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 the Switch Circuit
Install a wire jumper between the terminals of the connector for the fuel filter differential pressure switch.
Start the engine. Increase the engine speed to high idle.
Check for an event code for the engine fuel filter restriction. Expected Result:The event code is not active.Results:
OK - The event code is not active. The wiring between the connector and the ECM is OK.Repair: Check for a plugged fuel filter. If the fuel filter is OK, temporarily replace the fuel filter differential pressure switch. Verify that the problem is resolved before permanently replacing the fuel filter differential pressure switch.STOP
Not OK - The event code is still active. There is an open circuit in the wiring for the fuel filter differential pressure switch between the connector and the ECM. Proceed to Test Step 3.Test Step 3. Check the ECM
Remove electrical power from the engine ECM.
Disconnect the J2/P2 ECM connector.
Fabricate a jumper wire with Deutsch sockets on each end that is long enough to reach from the ECM connector to engine ground. Install the jumper wire into the socket for the signal wire of the fuel filter differential pressure switch.
Connect the jumper wire to engine ground.
Start the engine. Increase the engine speed to high idle.
Check for an event code for the engine fuel filter restriction. Expected Result:The event code is not active.Results:
OK - The event code is not active.Repair: There is an open in the wiring between the connector for the fuel filter differential pressure switch and the ECM connector P2. Repair the connectors or wiring and/or replace the connectors or wiring. Check the harness connector to the fuel filter differential pressure switch for a good connection.Verify that the repair eliminates the problem.STOP
Not OK - The event code is still active.Repair: Replace the ECM. Refer to Troubleshooting, "Replacing the ECM". Verify that the problem is resolved.STOP