BASE AS. 1551579 - Caterpillar

the keyswitch to the OFF position.
Short the wire jumper from P1-61 to the wire jumper from P1-35.
Turn the keyswitch to the ON position.
Observe the status of "Throttle Lock Switch" on Cat ET. The status should be "On".
Turn the keyswitch to the OFF position.
Short the wire jumper from P1-61 to the wire jumper from P1-47.
Turn the keyswitch to the ON position.
Observe the status of "Throttle Lock Switch" on Cat ET. The status should be "Off".
Turn the keyswitch to the OFF position.
Remove the jumper wires and reconnect the wires to the P1 ECM connector. Expected Result:The status should change accordingly as you short the terminals in the P1 ECM connector.Results:
OK - There is either an open circuit or a short circuit in the wiring between the ECM and the switch.Repair: Use continuity checks in order to determine the location of the open or short. Refer to the machine's electrical schematic for the complete electrical circuit.STOP
Not OK - The ECM is not responding to the inputs from the switch.Repair: Verify your results. Refer to Troubleshooting, "ECM - Replace" before replacing the ECM.Verify that the new ECM eliminates the problem.STOPTest Step 6. Check the Status of the "Throttle Lock Resume/Decel Switch" on Cat ET
Observe the status of "Throttle Lock Resume/Decel Switch Position" on Cat ET. Note: The status should be "Off".
Hold the "throttle lock resume/decel switch" in the RESUME/DECEL position and observe the status of "Throttle Lock Resume/Decel Switch Position" on Cat ET. Note: The status should be "On".Expected Result:The status should change accordingly as you change switch positions.Results:
OK - The "throttle lock resume/decel switch" appears to be operating properly at this time.Repair: The problem may be intermittent. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - There is a problem in the circuit for the "throttle lock resume/decel switch". Proceed to Test Step 7.Test Step 7. Short the Wire at the "Throttle Lock Resume/Decel Switch"
Turn the keyswitch to the OFF position.
Disconnect the P2 connector for the "throttle lock resume/decel switch".
Install a jumper wire between engine ground and terminal P2-3 (throttle lock resume/decel switch (N/C)) on the wiring harness connector for the "throttle lock resume/decel switch".
Turn the keyswitch to the ON position.
Observe the status of the "Throttle Lock Resume/Decel Switch Position" on Cat ET. The status should be "Off".
Turn the keyswitch to the OFF position.
Install a jumper wire between engine ground and terminal P2-2 (throttle lock resume/decel switch (N/O)) on the wiring harness connector for the "throttle lock resume/decel switch".
Turn the keyswitch to the ON position.
Observe the status of "Throttle Lock Resume/Decel Switch Position" on Cat ET. The status should be "On".
Turn the keyswitch to the OFF position.
Remove the jumper wire and reconnect the connector for the "throttle lock resume/decel switch". Expected Result:The status should change accordingly as you short the terminals in the wiring harness connector.Results:
OK - The ECM and the wiring harness are functioning properly.Repair: Verify that the ground connections on the P1 connector for the joystick have a good connection. The ground connections are