This diagnostic code is recorded when the machine ECM does not receive the engine speed signal from the engine ECM. This signal is sent on a dedicated circuit between the two electronic control modules. When this circuit is open or when this circuit is shorted to ground, the diagnostic code is recorded.
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 1401 FMI 03 is active before performing this procedure.
Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.
Test Step 1. CHECK THE CIRCUIT FOR A SHORT.
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the machine harness connectors from the solenoid and the ECM.
- At the machine harness connector for the ECM, measure the resistance from contact J2-38 (wire 450-YL) to all 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 machine harness is correct. Proceed to Test Step 2.
- NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J2-38 (450-YL) and the circuit that has a low resistance measurement.
Repair: Repair the machine harness or replace the machine harness.
Stop.
Test 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.
- At the ENGINE ECM, disconnect the machine harness connectors. Connect a jumper wire from connector J1-38 to J1-8.
- At the machine harness connector for the power train ECM, measure the resistance from J2-38 (wire 450-YL) to contact J1-9 (wire 944-OR).
Expected Result:
The resistance is less than 5.0 ohms.
Results:
- OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
- NOT OK - The resistance is greater than 5000 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.
Stop.
Test Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
- Inspect the harness connectors and clean the contacts of 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 190 FMI 02.
Expected Result:
The CID 190 FMI 02 is active.
Results:
- YES - The CID 190 FMI 02 is active. The diagnostic code has not been corrected. The ECM may have failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
Stop.
- NO - The CID 190 FMI 02 is not active. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
Stop.