4773754 Volvo.Penta Protecting casing

Illustration 1 g02090334
Schematic of the diagnostic connector and the data link connector for the diagnostic connector
Illustration 2 g02028056
View of the P1 pin locations for the diagnostic connector (8) Data link + (9) Data link -Test Step 1. Inspect Electrical Connectors and Wiring
Thoroughly inspect the following electrical connectors:
P1/J1 ECM connector
The connection for the diagnostic connectorRefer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the data link.
Check the screw for the ECM connectors for correct torque of 6 N m (53 lb in).
Check the harness for abrasion and pinch points from the wires that connect the diagnostic connector to the ECM.Expected Result:All connectors, pins, and sockets are correctly connected and/or inserted. The harness should be free of corrosion, abrasion and/or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following repair:Repair the connectors and/or the harness, or replace the connectors and/or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are correctly connected.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOPTest Step 2. Determine the Type of Fault in the Data Link
Connect the electronic service tool to the diagnostic connector that is on the engine harness or on the application.
Turn the keyswitch to the ON position.Expected Result:The power lamp should illuminate on the communications adapter. The power lamp on the communications adapter may illuminate when the keyswitch is in any position.Results:
OK - The communications adapter is currently receiving the correct voltage. Proceed to Test Step 5.
Not OK - The communications adapter is not receiving the correct voltage. Proceed to Test Step 3.Test Step 3. Check the Battery Voltage at the Diagnostic Connector
Turn the keyswitch to the ON position.
Use a multimeter in order to measure the voltage from pin A (battery+) and pin B (ground) of the diagnostic connector.Expected Result:The voltage is between 22.0 VDC and 27.0 VDC.Results:
The diagnostic connector is currently receiving the correct voltage. - Proceed to Test Step 5.
The diagnostic connector is not receiving the correct voltage. - Proceed to Test Step 4.Test Step 4. Bypass the Wiring for the Diagnostic Connector
Illustration 3 g01241517
View of the diagnostic connector from the wire side (A) Switched battery + (B) Battery ground (GND) (D) Data link + (E) Data link -
Disconnect the wires from pin A and pin B of the diagnostic connector.
Fabricate a jumper wire in order to connect pin "A" of the diagnostic connector to battery+ and pin "B" to the battery-.
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position.Expected Result:The power lamp should illuminate on the communications adapter. The power lamp on the communications adapter may illuminate when the keyswitch is in any position.Results:
The power lamp is illuminated - The fault is in the harness.Repair: Repair the faulty harness or replace the faulty harness.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOP
The power lamp is not illuminated. - Repair: Proceed to Test Step 6.Test Step 5. Check the Data Link Connections
Turn the keyswitch to the OFF position.
Disconnect the communications adapter from the diagnostic connector.
Disconnect connector P1 from the ECM. Check the resistance between P1:8 and pin "D" on the diagnostic connector.
Check the resistance between P1:9 and pin "E" on the diagnostic connector.Results:
The resistance is less than ten Ohms - Proceed to Test Step 6.
The resistance is greater than ten Ohms. - Repair: Perform the following repair:Repair the connectors and/or the harness, or replace the connectors and/or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are correctly connected.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOPTest Step 6. Change the Electronic Service Tool Components
If another electronic engine is available, connect the electronic service tool to the other engine. Ensure that the same cables are used.
Turn the keyswitch to the ON position. Determine if the electronic service tool operates correctly on the other engine.
If another engine is not available, obtain a replacement communications adapter and a replacement set of cables. Ensure that the set of cables for the electronic service tool is a complete set.
Install the replacement communications adapter and the set of cables for the electronic service tool and connect to the diagnostic connector.
Turn the keyswitch to the ON position.
If changing the communications adapter or the cables allows the electronic service tool to operate correctly, perform the following procedure:
Replace the components from the new set of cables with components from the original set of cables. Replace one component at a time.
Apply power to the electronic service tool after each of the components is replaced. Use this method to find the faulty component.
If changing the cables does not allow the electronic service tool to operate correctly, connect another electronic service tool.
Turn the keyswitch to the ON position.Results:
The original electronic service tool works on another engine - Proceed to Test Step 7.
A different electronic service tool works on the original engine while the engine is being tested. - Repair: Send the faulty electronic service tool for repairs.STOPTest Step 7. Connect an Electronic Service Tool and the ECM to another Battery