SEAL-O-RING 4309131 - Caterpillar

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Schematic for throttle lock switch
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01144470
Left side engine view
(1) J1/P1 ECM connectors
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Control console next to operator's seat (right side)
(2) Throttle lock switch
Thoroughly inspect ECM connector (1) and the connector for switch (2). Also inspect each of the machine connectors that are in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
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P1 ECM connector
(P1-5) Digital sensor return
(P1-44) Throttle lock control (N/O)
(P1-45) Throttle lock control (N/C)
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J705 Throttle lock switch connector
(J705-3) Throttle lock control (N/C)
(J705-4) Digital sensor return
(J705-5) Throttle lock control (N/O)
Perform a 45 N (10 lb) pull test on all of the wires that are in the ECM connectors and on wires (3), (4), and (5) of the connector for the throttle lock switch.
Check the torque of the allen head screw on the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from the switch back to the ECM. Expected Result:All of the connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be in good repair. Proceed to Test Step 2.
Not OK - The connectors and/or wiring need repair.Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. 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 for Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
Check the "Active Diagnostic Codes" screen for a 549-02 diagnostic code. Toggle the throttle lock switch and hold the switch in the active position for several seconds. Check Cat ET for the active diagnostic code.
Turn the keyswitch to the OFF position. Expected Result:A 549-02 diagnostic code is not active.Results:
OK - The switch is operating normally. There may be an intermittent problem.Repair: Check the wiring harness and service equipment for an intermittent electrical problem. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - A 549-02 diagnostic code is active. Proceed to Test Step 3.Test Step 3. Check the Resistance of the Switch Circuit at the ECM Connector
Ensure that the keyswitch is in the OFF position.
Disconnect the P1 connector. Note: Wiggle the harnesses during the following measurements in order to detect an intermittent problem.
Measure the resistance between terminals P1-5 (digital sensor return) and P1-44 (throttle lock control (N/O)). The correct resistance measurement is