HINGE AS-HOOD 2658405 - Caterpillar

Inspect the connections for the following:
Connections are clean.
Connections are secure.
Connections are in good condition.If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.Note: The following test procedure may create other diagnostic codes. Clear these created diagnostic codes when the original diagnostic code has been corrected.Test Step 1. CHECK THE SWITCH CIRCUITS FOR AN OPEN
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
Disconnect the connector of the left joystick J2 from the machine harness connector.
At the connector of the joystick J2, connect a jumper wire between the normally open contact J2-3 (wire U744-OR) and the normally closed contact J2-4 (wire U745-PK).
Disconnect the machine harness connectors J1 and J2 from the Implement ECM 2.
At the J2 machine harness connector for the Implement ECM 2, measure the resistance between the normally open contact J2-23 (wire U744-OR) and the normally closed contact J2-28 (wire U745-PK).Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The switch inputs of the circuits are not open in the machine harness. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5 ohms. One of the switch circuits is open in the machine harness.Repair: There is an open or a bad connection in the switch input wire U744-OR or wire U745-PK. Refer to the Electrical Schematic of the machine. Check the connectors that are in the switch circuits for the following:
Loose connections
Corroded connectionsRepair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE GROUND CIRCUITS FOR AN OPEN
The disconnect switch and the key start switch remain in the OFF position.
The connector of the left joystick J2 remains disconnected from the machine harness.
The connectors of the Implement ECM 2 remain disconnected from the machine harness.
Disconnect the connector of the left joystick J1 from the machine harness connector.
Disconnect the machine harness connector J1 from the Transmission/Chassis ECM.
At the connectors of the joystick J1 and J2, connect a jumper wire between the ground 1 contact J1-3 (wire L731-BR) and ground 4 contact J3-3 (wire 998-BR).
Obtain a spare length of wire that is long enough to reach from the Transmission/Chassis ECM to the cab of the machine.
Connect one end of the spare wire to the return contact of the Transmission/Chassis ECM J1-21 (wire L731-BR).
At the J1 machine harness connector for the Implement ECM 2, measure the resistance between return contact J1-21 (wire 998-BR) and the end of the spare wire that is connected to the return contact of the Transmission/Chassis ECM J1-21 (wire L731-BR).Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The ground circuits are not open in the machine harness. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5 ohms. One of the switch ground circuits is an open or there is a bad connection in the machine harness.Repair: Verify that the connection of the spare wire