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| Illustration 1 | g00450721 |
Schematic of the speed sensor (torque converter) | |
This diagnostic code is associated with the speed sensor (torque converter). The FMI 02 means that the ECM has determined that the signal frequency or the signal pulse width is not within the expected range. When the machine is in gear the ECM receives a speed signal from the transmission. Also, there should be a signal from the torque converter. If the signal from the torque converter is incorrect, the CID 0672 FMI 02 is active.
System Response:
The diagnostic code of CID 0672 FMI 02 will be logged in the internal memory of the ECM.
Note: Before performing the following Test Steps, adjust the speed sensor (if applicable). Refer to Troubleshooting, "Speed Sensor - Adjust". If the speed sensor is a type that does not require adjustment, proceed to Test Step 1.
Test Step 1. CHECK THE RESISTANCE OF THE CASE OF THE SENSOR .
- Turn the key start switch and the disconnect switch (if equipped) to the OFF position.
- Disconnect the machine harness connector from the sensor.
- Measure the resistance from contact 1 (wire E909-WH) and from contact 2 (wire E908-BR) to the case of the sensor.
Expected Result:
The resistance is greater than 10,000 ohms.
Results:
- OK - The resistance is greater than 10,000 ohms. Proceed to Test Step 2.
- NOT OK - The resistance is NOT greater than 10,000 ohms. The speed sensor has failed.
Repair: Replace the sensor.
Stop.
Test Step 2. CHECK THE RESISTANCE OF THE SENSOR.
- The machine harness connector remains disconnected.
- Measure the resistance between contact 1 (wire E909-WH) and contact 2 (wire E908-BR) of the connector of the sensor.
Expected Result:
The resistance is approximately 1075 ohms.
Results:
- OK - The resistance is approximately 1075 ohms. The resistance is correct. Proceed to Test Step 3.
- NOT OK - The resistance is NOT approximately 1075 ohms. The resistance is not correct. The sensor has failed.
Repair: Replace the sensor.
Stop.
Test Step 3. CHECK FOR AN OPEN WIRE IN THE MACHINE HARNESS.
- The key start switch and the disconnect switch (if equipped) remain in the OFF position.
- Reconnect the machine harness connector to the sensor.
- Disconnect the machine harness connector(s) from the ECM.
- At the machine harness connector, measure the resistance from contact J2-23 (wire E909-WH) to J2-29 (wire E908-BR).
Expected Result:
The resistance is approximately 1075 ohms.
Results:
- OK - The resistance is approximately 1075 ohms. The circuit is correct. Proceed to Test Step 4.
- NOT OK - The resistance is NOT approximately 1075 ohms. The circuit is open in the machine harness.
Repair: Repair the machine harness or replace the machine harness.
Stop.
Test Step 4. CHECK FOR A SHORT IN THE RETURN CIRCUIT OF THE MACHINE HARNESS.
- The key start switch and the disconnect switch (if equipped) remain in the OFF position.
- Disconnect the machine harness from the sensor.
- At the machine harness connector, measure the resistance between contacts J2-23 and J2-29 to all sources of ground.
Expected Result:
Each resistance measurement is greater than 5000 ohms.
Results:
- OK - Each resistance measurement is greater than 5000 ohms. Proceed to Test Step 5.
- NOT OK - There is a short in the machine harness.
Repair: Repair the machine harness or replace the machine harness.
Stop.
Test Step 5. CHECK IF THE DIAGNOSTIC CODE REMAINS
- Inspect the contacts of the harness connectors and clean the contacts.
- Reconnect all harness connectors.
- Turn the disconnect switch (if equipped) and the key start switch to the ON position.
- Operate the machine.
- Check for an active diagnostic code of CID 0672 FMI 02.
Expected Result:
The diagnostic code of CID 0672 FMI 02 is not active.
Results:
- OK - The diagnostic code of CID 0672 FMI 02 is not active. The failure is no longer present.
Repair: The diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connections that was disconnected and reconnected. Resume normal machine operation.
Stop.
- NOT OK - The diagnostic code of CID 0672 FMI 02 is active. The failure has not been corrected. The ECM has failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the failure is not found then replace the ECM.
Stop.