SPIDER AS-FAN 7C0876 - Caterpillar

Illustration 1 g03097016
Schematic of the Engine Speed Dial SwitchThis diagnostic code is associated with the engine speed dial switch. The FMI 05 means that the ECM has determined that the current of the switch is below normal. The possible causes of this diagnostic code are listed:
The circuit of the switch is open.
The switch has failed.
The ECM has failed. This is unlikely. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0586 FMI 05 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. CHECK THE SWITCH.
Turn the disconnect switch and the key start switch to the OFF position. Do not start the engine.
Disconnect the engine speed dial switch from the machine harness.
Use the following table for the rotary dial position and check the corresponding resistance for the switch.
Table 1
Rotary Dial Position     Check the Resistance Between the Following Contacts on the Switch.    
1     Contact (1)
to
Contact (2)    
3     Contact (1)
to
Contact (3)    
7     Contact (1)
to
Contact (4)    
10     Contact (1)
to
Contact (5)    Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The switch is correct. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5 ohms. The resistance measurement is not correct. There is an open circuit in the switch.Repair: Replace the switch.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
Use the following table for the placement of a jumper wire to the connector for the switch and check the corresponding resistance for the contacts of the machine harness connector(s).
Table 2
Jumper Location on the Connector for the Switch     Connector(s) for the Machine Harness    
Contact (1)
to
Contact (2)     Contact J1-9 (wire A755-PK) and contact J1-14 (wire 235-BK) of the machine harness.    
Contact (1)
to
Contact (3)     Contact J1-10 (wire A756-BU) and contact J1-14 (wire 235-BK) of the machine harness.    
Contact (1)
to
Contact (4)     Contact J1-19 (wire A757-GY) and contact J1-14 (wire 235-BK) of the machine harness.    
Contact (1)
to
Contact (5)     Contact J1-20 (wire A758-BR) and contact J1-14 (wire 235-BK) of the machine harness.    Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 0586