SHAFT 8H7816 - Caterpillar

Illustration 1 g01165048
Schematic for the Rotary Switch (Transmission Auto/Manual Switch)This diagnostic code is associated with the rotary switch (Transmission Auto/Manual Switch). This switch is equipped on the 824 Series H only. The rotary switch is connected to four inputs of the ECM. Three contacts are open and the other contact is grounded during proper operation.This FMI 03 means that the ECM has determined that all inputs are in the open state.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 0368 FMI 03 is active before performing this procedure.
Table 1
Auto/Manual Switch Status    
Switch
Position     Man
J1-29     Auto
J1-31     Auto
J1-32     Auto
J1-33    
2 (Manual)     Closed     Open     Open     Open    
3 (Auto 4)     Open     Closed     Open     Open    
4 (Auto 3)     Open     Open     Closed     Open    
5 (Auto 2     Open     Open     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(s) from the ECM. Disconnect the machine harness connector from the switch.
Measure the resistance between ECM connector contact J1-16 (wire 202-BK) and switch connector contact 1 (wire 202-BK).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 5 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 SWITCH CIRCUITS FOR A SHORT TO THE +BATTERY CIRCUIT
The machine harness connector(s) remains disconnected from the ECM.
The disconnect switch and the key start switch remain in the OFF position.
At the machine harness connector for the ECM, one wire at a time, measure resistance from contact J1-29 (wire 973-BR), contact J1-31 (wire 977-YL), contact J1-32 (wire H728-GN), and contact J1-33 (wire H729-WH) of the machine harness to all the contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The harness is correct. Proceed to Test Step 3.
NO - One or more of the measurements were less than 5000 ohms. There is a short in the machine harness.Repair: The short is between the two wires with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE SWITCH CIRCUITS IN THE HARNESS
The machine harness remains disconnected from the ECM and the switch.
At the harness connector for the switch, connect a jumper