955560 Volvo.Penta Hexagon screw

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+5 VOLT SENSOR LOCATIONS
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+5 VOLT SUPPLY CIRCUITTest Step 1. Inspect Electrical Connectors And Wiring.
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Terminal locations for ECM
Turn the keyswitch to the OFF/RESET position.
Thoroughly inspect the following connections:
ECM engine harness connector J2/P2
ECM machine harness connector J1/P1
Engine oil temperature sensor J101/P101
Turbocharger outlet pressure sensor J200/P200
Engine oil pressure sensor J201/P201
Atmospheric pressure sensor J203/P203
Injection actuation pressure sensor J204/P204
Fuel pressure sensor J208/P208Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Thoroughly inspect ECM connector J1/P1, ECM connector J2/P2, machine connector J61/P61, and all other connectors in the wiring harness. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.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 abrasion and pinch points from the sensors back to the ECM.Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
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. Stop.Test Step 2. Connect an Electronic Service Tool and Check for Active Diagnostic Codes.
Connect an electronic service tool to the cab data link connector.
Turn the keyswitch to the ON position while the engine is OFF.
Monitor the active diagnostic code screen of the electronic service tool. Check and record any active diagnostic codes.Note: Wait at least 15 seconds in order for the diagnostic codes to become active.Expected Result:Select the condition of the following codes:
262-03 5 Volt Sensor Supply short to +batt
262-04 5 Volt Sensor Supply short to groundResults:
Active - Proceed to Test Step 3.
Logged ONLY - Proceed to Test Step 5.
Not Active or Logged - The +5 V supply is operating correctly at this time. Stop.Test Step 3. Disconnect The ECM Engine Harness Connector From The ECM.
Connect an electronic service tool to the cab data link connector.
Turn the keyswitch to the OFF position while the engine is off.
Disconnect ECM engine harness connector J2/P2.
Turn the keyswitch to the ON position while the engine is OFF.
Access the active diagnostic code screen on the electronic service tool. Check for one of the following active diagnostic codes:
262-03 5 Volt Sensor Supply short to +batt
262-04 5 Volt Sensor Supply short to groundNote: When ECM engine harness connector J2/P2 is disconnected and the keyswitch is in the ON position, open circuit diagnostic codes will be "Active" or "Logged" for all of the engine sensors. This is normal.Expected Result:The +5 V diagnostic code is active when the ECM engine harness connector is disconnected.Results:
Yes - The +5 V diagnostic code is active when the ECM engine harness connector is disconnected.Repair: Temporarily connect a test ECM to ECM machine harness connector J1/P1. Recheck for a +5 V diagnostic code. If a +5 V diagnostic code is not active, the original ECM is faulty. Reconnect the original ECM and check the +5 V diagnostic codes. If a +5 V diagnostic code becomes active, replace the ECM. Stop.
No - The +5 V sensor diagnostic code is no longer active when the harness is disconnected. Either the harness or a sensor that is attached to the harness is causing the problem. Reconnect the ECM engine harness connector. Proceed to Test Step 4.Test Step 4. Disconnect The +5 V Sensors While Active Diagnostic Codes Are Being Monitored.
Connect an electronic service tool to the cab data link connector.
Turn the keyswitch to the ON position while the engine is OFF.
Access the active diagnostic code screen on the electronic service tool. Verify that one of the following diagnostic codes is active:
262-03 5 Volt Sensor Supply short to +batt
262-04 5 Volt Sensor Supply short to ground
Disconnect the following sensors one at a time:
Engine oil temperature sensor J101/P101
Turbocharger outlet pressure sensor J200/P200
Engine oil pressure sensor J201/P201
Atmospheric pressure sensor J203/P203
Injection actuation pressure sensor J204/P204
Fuel pressure sensor J208/P208
Wait for 30 seconds after each pressure sensor is disconnected while the electronic service tool is being monitored in order to verify that the disconnection of a specific sensor deactivates the +5 V diagnostic code.Note: When the sensors are disconnected and the keyswitch is in the ON position, open circuit diagnostic codes will be active or logged when the +5 V diagnostic codes are no longer active. This is normal. Clear these diagnostic codes after this test step is completed.Expected Result:The original +5 V diagnostic code remains active.Results:
Yes - The +5 V diagnostic code is still active. The harness is the cause of the problem. Leave the sensors disconnected. Proceed to Test Step 5.
No - The +5 V diagnostic code is not active when a specific sensor is disconnected.Repair: Reconnect the sensor that is suspected of causing the problem. If the problem returns after the reconnection of the sensor, disconnect the sensor. If the problem disappears after the disconnection of the sensor, replace the sensor.Clear all diagnostic codes. Verify that the repair eliminates the problem. Stop.Test Step 5. Check the Engine Harness.
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Turn the keyswitch to the OFF position while the engine is OFF.
Disconnect ECM connector J2/P2 and ECM J1/P1. Verify that all of the +5 V engine pressure sensors that are attached to the ECM connectors are disconnected.
Engine oil temperature sensor J101/P101
Turbocharger outlet pressure sensor J200/P200
Engine oil pressure sensor J201/P201
Atmospheric pressure sensor J203/P203
Injection actuation pressure sensor J204/P204
Fuel pressure sensor J208/P208
Set a multimeter in order to measure the resistance on the ra