889970 Volvo.Penta Sleeve

Illustration 1 g01254014
Schematic for the ignore brake/clutch switch
Test Step 1. Check the Status of the "Ignore Brake/Clutch Switch"
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
Monitor the status for the "Ignore Brake/Clutch Switch" while the ignore brake/clutch switch is toggled to the ON position and the OFF position. The correct status for the "Ignore Brake/Clutch Switch" is "On" when the switch is turned on. The correct status for the "Ignore Brake/Clutch Switch" is "Off" if the switch is turned off.Note: If the "Ignore Brake/Clutch Switch" status indicates "Not Installed", then the "Ignore Brake/Clutch Switch" parameter has not been programmed.Expected Result:Cat ET is reporting the correct status for the switch.Results:
OK - Cat ET is reporting the correct status for the switch.Repair: The ignore brake/clutch switch appears to operating correctly at this time. There may be an intermittent electrical problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for information that is related to troubleshooting intermittent electrical problems.STOP
Not OK - Cat ET is not reporting the correct status for the switch. The ECM is not reading the change in switch status. Proceed to Test Step 2.Test Step 2. Check the Electrical Connectors and the Wiring
Illustration 2 g01186024
Location of the J1/P1 ECM connectors (typical left side engine view)
Thoroughly inspect the J1/P1 ECM connectors and the firewall bulkhead connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01254023
Terminal locations at the P1 ECM connector for the ignore brake/clutch switch
(18) Input No. 1 sensor return
(47) Input No. 5 (ignore brake/clutch switch)
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the suspect switch circuit.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and pinch points from the battery to the ECM. Then, check the wiring from the keyswitch to 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 3.
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 3. Create a Short Circuit at the Switch
Fabricate a jumper wire that is long enough to create a short circuit across the terminals at the harness connector for the ignore brake/clutch switch.
Disconnect the switch from the harness.
Install the jumper wire across the two switch terminals at the harness connector for the ignore brake/clutch switch.
Turn the keyswitch to the ON position.
Use Cat ET to monitor the status of the "Ignore Brake/Clutch Switch". While the status for the "Ignore Brake/Clutch Switch" is monitored, remove the jumper wire and then insert the jumper wire.
Turn the keyswitch to the OFF position. The correct status for the "Ignore Brake/Clutch Switch" is "On" when the jumper wire is installed. The correct status for the "Ignore Brake/Clutch Switch" is "Off" when the jumper wire is removed.Expected Result:Cat ET is reporting the correct status for the switch.Results:
OK - Cat ET is reporting the correct status.Repair: The wiring harness and the ECM are OK. There is a problem with the switch. Replace the ignore brake/clutch switch. Verify that the repair eliminates the problem.STOP
Not OK - Cat ET does not report the correct status. There is a problem in the wire harness between the ignore brake/clutch switch and the ECM. There may be a problem with the ECM. Restore the wiring to the original configuration. Proceed to Test Step 4.Test Step 4. Check for Proper Operation of the ECM
Disconnect the J1/P1 ECM connectors.
Fabricate two jumper wires that are long enough to create a test circuit at the ECM connector. Crimp a connector socket to one end of each of the jumper wires.
Remove the wires from terminal location P1-18 (input sensor return No. 1) and terminal location P1-47 (input No. 5 (ignore brake/clutch switch)). Install one of the jumper wires into each of these terminal locations.
Connect the J1/P1 ECM connectors.
Turn the keyswitch to the ON position.
Monitor the status of the "Ignore Brake/Clutch Switch" while you short the loose ends of the jumper wires. Provide an open circuit for the loose ends of the jumper wires. Recheck the switch status. The correct status for the "Ignore Brake/Clutch Switch" is "On" when the jumper wires are shorted together. The correct status for the "Ignore Brake/Clutch Switch" is "Off" when the jumper wires are open.
Turn the keyswitch to the OFF position.
Restore all wiring to the original configuration. Expected Result:Cat ET is reporting the correct status for the switch.Results:
OK - Cat ET is reporting the correct status for the switch.Repair: The ECM is functioning properly at this time. There is a problem in the OEM wiring harness that is between the ECM connector and the ignore brake/clutch switch. Repair the circuit or send the vehicle to the OEM dealer for repairs.STOP
Not OK - Cat ET does not report the correct status for the switch. Repair: The ECM is not reading the switch input properly. There is a problem with the ECM. Replace the ECM. Refer to Troubleshooting, "Replacing the ECM". Verify that the original problem is resolved.STOP