3852064 Volvo.Penta Nut

Illustration 1 g00891804
Illustration 2 g00890812
Schematic for pressure sensorsTest Step 1. Check For Active +5 V Sensor Supply Diagnostic Codes.
Connect an electronic service tool to the cab data link connector.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Verify if any of the following diagnostic codes are active:
CID 262-FMI 03, SPN 620-FMI 03, Flash Code 21 5 Volt Sensor Supply short to +batt
CID 262-FMI 04, SPN 620-FMI 04, Flash Code 21 5 Volt Sensor Supply short to groundExpected Result:One or more of the preceding diagnostic codes are active.Results:
Yes - Repair: Perform the following diagnostic procedure: Troubleshooting, "5 Volt Engine Pressure Sensor Supply Circuit - Test". Stop.
No - Proceed to Test Step 2.Test Step 2. Verify All Active Diagnostic Codes.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Verify if any of the diagnostic codes are active.
Verify that a 5 Volt sensor supply is present.Expected Result:One or more of the preceding diagnostic codes are active.Results:
Yes - Proceed to Test Step 4.
No - Repair: If the preceding codes are logged but not active and the engine is not running properly, refer to Troubleshooting, "Troubleshooting without a Diagnostic Code". If the engine is running properly at this time, an intermittent condition may be causing the logged codes. Refer to Troubleshooting, "Electrical Connectors - Inspect". Stop.Test Step 3. Inspect Electrical Connectors And Wiring.
Illustration 3 g00797408
Engine harness connector P2
Inspect the ECM engine harness connectors. 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 and the sensor connectors that are associated with the active diagnostic code.Refer to Illustration 3.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
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 should be completely coupled and/or inserted. The harness and wiring should be free of corrosion, abrasion, and pinch points.Results:
OK - Proceed to Test Step 4.
Not OK - 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.Clear all logged diagnostic codes. Stop.Test Step 4. Verify That the Diagnostic Code Is Still Active.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Monitor the "Active Diagnostic Code "screen of the electronic service tool. Check and record active diagnostic codes.
Determine if the problem is related to an open circuit diagnostic code or a short circuit diagnostic code.Expected Result:Either a short circuit diagnostic code is active or an open circuit diagnostic code is active.Results:
SHORT Circuit - A short circuit diagnostic code is active at this time. Proceed to Test Step 5.
OPEN Circuit - An open circuit diagnostic code is active at this time. Proceed to Test Step 6.Test Step 5. Disconnect The Sensor In Order To Create An Open Circuit.
Turn the keyswitch to the OFF position.
Disconnect the sensor connector of the sensor with the short circuit diagnostic code.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Access the "Active Diagnostic Code" screen on the electronic service tool. Check for an active open circuit diagnostic code.Expected Result:An open circuit diagnostic code for the disconnected sensor is now active.Results:
OK - A short circuit diagnostic code was active before disconnecting the sensor. An open circuit diagnostic code became active after disconnecting the sensor. Proceed to Test Step 7.
Not OK - There is a short circuit between the sensor harness connector and the ECM. Leave the sensor disconnected. Proceed to Test Step 9.Test Step 6. Measure the Sensor Supply Voltage.
Turn the keyswitch to the OFF position.
Disconnect the sensor from the engine harness.
Connect a 3-Terminal Breakout T to the engine harness only. Do not connect the sensor to the Breakout T.
Turn the keyswitch to the ON position.
Measure the voltage from the terminal "A" (pressure sensor supply) to terminal "B" (sensor common).Expected Result:The DC voltage from terminal "A" to terminal "B" measures 4.5 to 5.5 VDC.Results:
OK - The sensor supply voltage is correct. Remove the Breakout T. Proceed to Test Step 8.
Not OK - The sensor supply voltage is out of range. Continue testing the sensor supply circuit.Repair: Proceed to the following repair: Troubleshooting, "5 Volt Engine Pressure Sensor Supply Circuit - Test" Stop.Test Step 7. Determine If The Short Circuit Is In The Connector Or In The Sensor.
Thoroughly inspect the connector for moisture.
Inspect the seals and reconnect the sensor.
If the short circuit diagnostic code reappears, the sensor or the pigtail harness connector is the problem.
Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine.
Check for a short circuit diagnostic code while the new sensor is connected to the harness.Expected Result:The short circuit diagnostic code is not present when a new sensor is connected.Results:
OK - Verify that the repair eliminates the problem. Clear the logged diagnostic codes. Stop.
Not OK - Repair the engine harness connector. Stop.Test Step 8. Create A Short Circuit Between The Signal And The Common Terminals At The Engine Harness Connector.
Illustration 4