CONTROL GP-AUTOSHIFT 1213412 - Caterpillar

Illustration 1 g00744866
Schematic for the switch circuit for the work tool lockoutTest Step 1. CHECK FOR PROPER OPERATION
Occupy the seat.
Place the armrest in the DOWN position.
Turn the key start switch to the ON position.
Place the work tool lockout switch in the OFF position.
Press and release the parking brake switch.Expected Result:The auxiliary hydraulics and/or the high flow should function.Results:
OK - The auxiliary hydraulics and/or the high flow is functioning. Proceed to Test Step 2.
NOT OK - The auxiliary hydraulics and/or the high flow does not function and the main work tool is functioning. Proceed to Test Step 3.
NOT OK - The auxiliary hydraulics and/or the high flow does not function and the main work tool does not function.Repair: See Troubleshooting, RENR2864, "Switch (Work Tool Lockout)". Stop.Test Step 2. CHECK FOR PROPER OPERATION
Place the the work tool lockout switch in the ON position.Expected Result:The auxiliary hydraulics and/or the high flow should not function.Results:
OK - The auxiliary hydraulics and/or the high flow does not function.Repair: There is no problem at this time. Stop.
NOT OK - The auxiliary hydraulics and/or the high flow is functioning and the main work tool is not functioning. Proceed to Test Step 3.
NOT OK - The auxiliary hydraulics and/or the high flow is functioning and the main work tool is functioning.Repair: See Troubleshooting, RENR2864, "Switch (Work Tool Lockout)". Stop.Test Step 3. CHECK THE CONTINUITY OF THE SWITCH
Remove the switch from the headliner.
Unplug the switch from the wire harness.
Place the switch in the ON position.
Measure the resistance from contact 4 to contact 5 of the wire harness connector.Expected Result:The resistance should be less than 5 Ohms.Results:
OK - The resistance is less than 5 Ohms. Proceed to Test Step 4.
NOT OK - The resistance is not less than 5 Ohms.Repair: The switch has failed. Replace the switch. Stop.Test Step 4. CHECK THE SWITCH CIRCUIT
Remove the floorplate in order to get to the ECM.
Remove the wire harness from the ECM.
Place the switch in the ON position.
Measure the resistance from contact 3 to contact 47 of the wire harness connector.Expected Result:The resistance should be less than 5 Ohms.Results:
OK - The resistance is less than 5 Ohms.Repair: See Troubleshooting, "Switch (Parking Brake)". Stop.
NOT OK - The resistance is not less than 5 Ohms.Repair: The circuit is open in the wire harness and/or the connector between the interlock ECM and the auxiliary hydraulic ECM. Repair the wire harness and/or the connector or replace the wire harness and/or the connector. Stop.