FITTING-HEAD 4653558 - Caterpillar

Illustration 1 g01094676
This diagnostic code is active when there are too many error messages on the CAN data link.Test Step 1. CHECK IF THE DIAGNOSTIC CODE REMAINS
Move the "Power/Setup" Switch for the display to the "OFF" position.
Turn the key start switch for the machine to the "OFF" position.
Turn the key start switch for the machine to the "ON" position.
Move the "Power/Setup" Switch for the display to the "ON" position.Expected Result:The diagnostic code becomes inactive.Results:
OK - The diagnostic code is no longer active. An issue with the internal software probably caused the diagnostic code.Repair: Resume normal machine operation.STOP
NOT OK - The diagnostic code is still active. Proceed to Test Step 2.Test Step 2. CHECK THE RESISTANCE OF THE CAN CIRCUIT
Place the key start switch and the disconnect switch in the OFF position.
Take the following measurement at the Connector for the Right or the Left Hand laser harness. Measure the resistance between contact C (wire L854-YL) and contact D (wire L855-GN).Expected Result:The resistance measurement is 60 6 ohms.Results:
YES - The resistance measurement is 6 6 ohms. Proceed to Test Step 5.
NO - The resistance measurement is NOT 6 6 ohms. Proceed to Test Step 3.Test Step 3. CHECK THE CAN TERMINATION RESISTORS.
Place the key start switch and the disconnect switch in the OFF position.
Disconnect the 3-pin connector for all four of the termination resistors.
Measure the resistance between contact A (wire L854-YL) and contact B (wire L855-GN) for all of the resistors. Note the resistance.Expected Result:The resistance measurement is 120 12 ohms.Results:
YES - The resistance measurement is 120 12 ohms. Reconnect the resistors. Proceed to Test Step 5.
NO - One or all resistance measurements is NOT 120 12 ohms. Repair: Replace the termination resistor(s) that did not measure 120 12 ohms.STOPTest Step 4. CHECK THE HIGH CIRCUIT OF THE CAN DATA LINK FOR SHORTS
Move the "Power/Setup"Switch on the display to the "OFF" position.
Turn the key start switch and the disconnect switch for the machine to the "OFF" position.
Disconnect all of the sensors that are connected to the harness.
Laser Receivers
Angle Sensors
Rotation Sensor
Illustration 2 g01189993
Take the following measurements at the Connector on the Left or the Right Knuckle. Measure the resistance between the contacts that are listed in Table 1.
Table 1
Harness Connector at Angle Sensor    
Check from Pin C to Pin A    
Check from Pin C to Pin B    
Check from Pin C to Pin C    
Check from Pin C to Pin D    
Check from Pin C to Pin E    
Check from Pin C to Pin F    
Check from Pin C to Pin G    Expected Result:The resistance measurement is greater than 5000 ohms.Results:
OK - All of the resistances that were measured are greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 5.
NOT OK - One or more of the resistances that were measured is less than 5000 ohms. The resistance measurement is not correct. There is an short circuit