3583753 Volvo.Penta O-ring

Illustration 1 g00682363
Schematic for torque limit switch
Illustration 2 g01105866
Terminal locations for ECM
(P1-7) Input number 4 (Torque limit switch)
(P1-18) Input number 1 (Sensor common) Test Step 1. Inspect Electrical Connectors and Wiring
Thoroughly inspect the ECM vehicle harness connector J1/P1, the connectors, and the firewall bulkhead 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 that are associated with the circuit for the torque limit switch. The wires are on the following terminals:
P1-7
P1-18
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and the wiring for abrasion and for pinch points from the battery to the ECM. Then, check from the ignition key switch to the ECM. Refer to Illustration 2 for terminal locations for the ECM.Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion or of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with 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 Status of the Torque Limit Switch on Caterpillar Electronic Technician (ET)
Connect Cat ET to the cab data link connector.
Turn the ignition key switch to the ON position.
Operate the switch in the ON position and the OFF position.
View the status of the "Torque Limit Switch" on Cat ET.
If the status of the "Torque Limit Switch" indicates "Not Installed", then the "Torque Limit Switch" parameter has not been programmed. Expected Result:The status screen indicates "ON" if the switch is turned on. The status screen indicates "OFF" if the switch is off.Results:
OK - The switch is operating normally.STOP
Not OK - The ECM is not reading the change in the status of the switch. Proceed to Test Step 3.Test Step 3. Check the Switch Circuit at the ECM
Turn the ignition key switch to the OFF position.
Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wire.
Remove the wire in P1-7 Torque limit switch from the ECM connector P1.
Install a 140-2266 Cable As (70-PIN BREAKOUT) to the ECM vehicle harness connector J1/P1.
Insert the jumper wire into terminal 7 (Torque limit switch) of the breakout T. Connect the other end of the jumper wire to terminal 18 (sensor common).
Connect Cat ET to the cab data link connector.
Turn the ignition key switch to the ON position.
Alternately remove the jumper wire and then insert the jumper wire from terminal 5. At the same time, monitor the status screen on Cat ET.
Turn the ignition key switch to the OFF position.
Reconnect all wire to the original configuration. Expected Result:The switch status changes to "ON" with the jumper wire in place. The switch status changes to "OFF" when the jumper wire is removed.Results:
OK - The ECM is functioning properly at this time. Proceed to Test Step 4.
Not OK - The ECM is not functioning properly.Repair: Perform the following repair:
Temporarily connect a test ECM.
Recheck the system for active diagnostic codes.
Repeat the Test Step.
If the problem is resolved with the test ECM, reconnect the suspect ECM.
If the problem returns with the suspect ECM, replace the ECM.
Verify that the repair eliminates the problem. STOPTest Step 4. Insert a Jumper Wire at the Switch
Turn the ignition key switch to the OFF position.
Reconnect the ECM vehicle harness connector J1/P1.
Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wire.
Insert the jumper wire between the two switch terminals of the torque limit switch.
Turn the ignition key switch to the ON position.
Alternately remove the jumper wire and then insert the jumper wire at the switch terminals. At the same time, watch the status screen on Cat ET. Expected Result:The switch status changes to "ON" with the jumper wire in place. The switch status changes to "OFF" when the jumper wire is removed.Results:
OK - The switch status changes to "ON" with the jumper wire in place. The switch status changes to "OFF" when the jumper wire is removed.Repair: Replace the torque limit switch.Verify that the repair eliminates the problem.STOP
Not OK - There is a problem in the wire harness between the torque limit switch and the ECM. Proceed to Test Step 5.Test Step 5. Insert a Jumper Wire at the Bulkhead Connector
Turn the ignition key switch to the OFF position.
Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wire.
Locate the torque limit switch socket in the engine side of the ECM bulkhead connector.
Insert the wire jumper pin between the switch socket and the sensor common connection. Install the jumper wire on the Engine side of the ECM bulkhead connector.
Turn the ignition key switch to the ON position.
Alternately connect and then disconnect the jumper wire. At the same time, monitor the status screen on Cat ET. Expected Result:The switch status changes from "ON" with the jumper wire in place. The switch status changes to "OFF" when the jumper wire is removed.Results:
OK - The problem is in the vehicle wiring between the Bulkhead connector and the switch.Repair: Inspect the vehicle wiring and then repair the vehicle wiring. Otherwise, send the vehicle to the OEM dealer for repair. Verify that the original condition is resolved.STOP
Not OK - The problem is in the vehicle wiring between the bulkhead connector and the ECM.Repair: Inspect the vehicle wiring and then repair the vehicle wiring. Otherwise, send the vehicle to the OEM dealer for repair. Verify that the original condition is resolved. STOP