ROD KIT 0878524 - Caterpillar

Illustration 1 g01139153
Schematic of the Hydraulic Oil Temperature senderThis diagnostic code is recorded when the Monitoring ECM determines the signal output voltage of the Hydraulic Oil Temperature sender is below normal. The machine ECM receives that information through the Cat Data Link.The possible causes of this diagnostic code are listed:
The sender has failed.
There is an open in the sender circuit.
There is a short to ground in the sender circuit.
The Monitor ECM has failed, but is unlikely.Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all the machine harnesses and connectors involved in the circuit. Make sure to verify that all of the connections in the circuit are clean, secure, and in good condition. Correct any problems found with any of the connections. Verify the diagnostic code CID 0600 FMI 04 is still active, before continuing with this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes now, but clear those diagnostic codes when the original diagnostic code has been corrected. System Response:Valve calibrations cannot be performed.Test Step 1. CHECK THE SENDER.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the machine harness from the Hydraulic Oil Temperature sender.
Turn the disconnect switch and the key start switch to the ON position.
Observe the status of the CID 0600 FMI 04 diagnostic code. Expected Result:The CID 0600 FMI 04 code is no longer active. Results:
YES - The CID 0600 FMI 04 code is no longer active. The Hydraulic Oil Temperature sender has failed. Repair: Replace the sender.STOP
NO - The CID 0600 FMI 04 code remains active. The sender is not the problem. Go to test step 2.Test Step 2. CHECK THE HARNESS FOR OPENS OR SHORTS.
Table 1
FAHRENHEIT TEMPERATURE     CENTIGRADE TEMPERATURE     OHMS RESISTANCE    
0     -17     20842 - 25451    
25     -4     6134 - 7496    
50     +10     2224 - 2718    
75     +24     973 - 1189    
100     +38     475 - 522    
125     +52     221 - 269    Note: Use the values in Table 1 to verify the typical resistance value of the Temperature Sender under the given hydraulic oil temperatures.
The sender remains disconnected.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the CN-2 machine harness connector from the Monitor ECM.
In the harness connector for the sender, measure the resistance between the signal contact (wire 491-PK) and frame ground. Expected Result:The resistance is greater than 5000 ohms. Results:
YES - The resistance is greater than 5000 ohms. The circuit is open in the harness. Repair: Repair or replace the harnessSTOP
NO - The resistance is less than 5 ohms. The circuit is shorted to ground in the harness. There is a short between frame ground and the signal circuit in the machine harness. Repair: Repair the machine harness or replace the machine harness. STOP