BOSS-FUSE PANEL 8I6340 - Caterpillar

Illustration 1 g01463731
Schematic of the Transmission Shift Assembly
Illustration 2 g01465948
Schematic of the Transmission Upshift Switch(Part of the Transmission Shift Assembly Schematic)This diagnostic code is associated with the Transmission Upshift Switch. The Transmission Upshift Switch is part of the Transmission Shift Assembly. The Transmission Upshift Switch is connected to two inputs of the ECM. One contact is open and the other contact is grounded during proper operation.This FMI 03 means that the ECM has determined that both circuits have been open for at least 1 minute.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0622 FMI 03 is active before performing this procedure.
Table 1
Upshift Switch    
Switch Position    G760-WH Circuit
N/O J1-41    G768-GN Circuit
N/C J1-40    
Depressed     Closed     Open    
Released     Open     Closed    Test Step 1. CHECK THE GROUND CIRCUIT OF THE SWITCH IN THE HARNESS
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the switch harness assembly.
Measure the resistance between contact 2 (wire 202-BK) of the machine harness and frame ground.Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The circuit is correct. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5000 ohms. The circuit is open. The machine harness has failed.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE OPERATION OF THE SWITCH IN THE RELEASED POSITION
The machine harness remains disconnected from the switch harness assembly.
Connect one lead from a multimeter to contact 2 (wire 202-BK) of the switch harness assembly.
Connect the other lead from a multimeter to contact 5 (wire G768-GN) of the switch harness assembly.
Measure the resistance between contact 2 and contact 5. Note the resistance.
Dis