22441904 Volvo.Penta End cover

Illustration 1 g00749598
SchematicTest Step 1. Check the Electrical Connectors and the Wiring.
Turn the Battery switch for the ECM to the OFF position.
Turn the Battery switch for the ECM to the OFF position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and pinch points.
Reconnect ECM connector J2/P2.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - The wiring and connectors are okay. Proceed to Test Step 2.
Not OK - Repair the wiring and connectors or replace the wiring or the connectors. Ensure that all of the seals are properly connected. Verify that the repair eliminates the problem.STOPTest Step 2. Check for a Short Circuit in the Wiring Harness.
Disconnect ECM connector J1/P1, ECM connector J2/P2, and all of the digital sensors.
Measure the resistance between the digital supply P1-35 (700-OR) and the digital return P1-29 (998-BR) on connector P1.
Measure the resistance between the digital supply P1-35 (700-OR) and engine ground.
Measure the resistance between the digital return P1-29 (998-BR) and engine ground.Expected Result:The resistance should be greater than 20,000 Ohms for each measurement.Results:
OK - The resistance is greater than 20,000 Ohms. Proceed to test step 3.
Not OK - The resistance is less than 20,000 Ohms.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 3. Check the Digital Supply Voltage at the ECM.
Install a Breakout T at the Primary ECM connector J1/P1.
Remove the wires from P1-35 and P1-29 at the Breakout T.Note: If you remove the sensor common from the ECM an open circuit diagnostic code will be generated for all sensors that use the sensor common. Troubleshoot the original code. Delete the logged diagnostic codes when you are finished.
Turn the breaker at the battery to the ON position.
Turn the Battery switch for the ECM to the ON position.
Measure the voltage between the digital sensor supply P1-35 and the digital sensor return P1-29 at the Breakout T.
Turn the Battery switch for the ECM to the OFF position.
Remove the Breakout T and reconnect ECM connector J1/P1.Expected Result:The supply voltage should be 8.0 0.5 VDC.Results:
OK - The supply voltage is 8.0 0.5 VDC. The digital sensor supply is producing the correct voltage. Proceed to test step 4.
Not OK - The supply voltage is not 8.0 0.5 VDC. The digital sensor is not producing the correct voltage.Repair: Perform the following diagnostic procedure Troubleshooting, "Electrical Power Supply".STOPTest Step 4. Check the Digital Sensor Supply Voltage at the Sensor Connector.
Turn the Battery switch for the ECM to the ON position.
Measure the digital sensor supply voltage between the digital supply terminal-A (700-OR) and the digital return terminal-B (998-BR) of all the digital sensors. Repeat the above steps for all of the digital sensors.Expected Result:The supply voltage should be 8.0 0.5 VDC.Results:
OK - The supply voltage is 8.0 0.5 VDC at all of the digital sensor connectors. Proceed to test step 5.
Not OK - The supply voltage is not 8.0 0.5 VDC. There is an open circuit in the harness or connectors.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 5. Check the Digital Sensors for Short Circuits.
Connect one digital sensor at a time.
Check the digital sensor supply voltage between the digital supply terminal-A (700-OR) and the digital return terminal-B (998-BR). Repeat this step with all of the digital sensors.Note: If the sensor is disconnected from the harness, an open circuit diagnostic code will be generated for that sensor. Troubleshoot the original code. Delete the logged diagnostic codes when you are finished.
Turn the Battery switch for the ECM to the OFF position.Expected Result:The supply voltage should be 8.0 0.5 VDC.Results:
OK - The supply voltage is 8.0 0.5 VDC. The digital sensor supply is correct. The harness is okay. STOP
Not OK - The supply voltage is not 8.0 0.5 VDC. The sensor may be internally shorted.Repair: Temporarily install a new sensor. Ensure that the problem is no longer present. Reinstall the old sensor. If the problem returns, replace the sensor.STOP
Intermittent - The problem is intermittent.Repair: Perform the diagnostic functional test in Troubleshooting, "Inspecting Electrical Connectors".STOP