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| Illustration 1 | g00743059 |
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Schematic of the transmission output speed sensor (No.2) | |
This diagnostic code is associated with the transmission output speed sensor (No.2). This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads the signal of the sensor as being out of range.
Note: This diagnostic code is usually an intermittent condition. The diagnostic code can be active or the diagnostic code can be not active.
The possible causes of this condition are listed:
- The signal circuit is intermittently shorted to the +battery circuit or shorted to frame ground.
- The sensor has failed.
Note: The engine must be running in order for this diagnostic code to be active.
The FMI 08 means that the ECM has determined that the frequency from the sensor is abnormal.
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 0673 FMI 08 is active before performing this procedure.
System Response:
The ECM is receiving erratic information for the transmission output speed sensor (No.2). If the transmission output speed sensor (No.1) and the engine speed sensor are working properly, this diagnostic code will have no effect on the machine response.
Test Step 1. CHECK THE SENSOR.
- Turn the battery disconnect switch and the key start switch to the ON position.
- Ensure that the diagnostic code is active.
- Disconnect the sensor from the machine harness.
Expected Result:
The diagnostic code is no longer active.
Results:
- YES - The diagnostic code is no longer active. The sensor has failed.
Repair: Replace the sensor. Verify that the new sensor corrected this diagnostic code. The diagnostic code should not be active.
STOP
- NO - The diagnostic code remains active. The sensor is not the cause of the diagnostic code. Proceed to Test Step 2.
Test Step 2. CHECK FOR A SHORT TO +BATTERY
- The sensor remains disconnected from the machine harness.
- Turn the key start switch and the battery disconnect switch to the OFF position.
- Disconnect the J1 and J2 machine harness connectors from the ECM.
- At the J2 machine harness connector for the ECM, measure the resistance between the signal contact J2-14 (wire E900-WH(White)) to all other possible sources of +battery.
Expected Result:
Each resistance measurement should be greater than 5 ohms.
Results:
- OK - Each resistance measurement is greater than 5 ohms. Proceed to Test Step 3.
- NOT OK - The resistance measurement is less than 5 ohms. The machine harness has failed.
Repair: The machine harness has failed. There is a short in the machine harness. The short is between the signal circuit (wire E900-WH(White)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.
STOP
Test Step 3. CHECK FOR A SHORT TO FRAME GROUND
- The sensor remains disconnected from the machine harness.
- Turn the key start switch and the battery disconnect switch to the OFF position.
- Disconnect the J1 and J2 machine harness connectors from the ECM.
- At the J2 machine harness connector for the ECM, measure the resistance between the signal contact J2-14 (wire E900-WH(White)) to all other possible sources of frame ground.
Expected Result:
Each resistance measurement should be greater than 5 ohms.
Results:
- OK - Each resistance measurement is greater than 5 ohms. Proceed to Test Step 4.
- NOT OK - The resistance measurement is less than 5 ohms. The machine harness has failed.
Repair: The machine harness has failed. There is a short in the machine harness. The short is between the signal circuit (wire E900-WH(White)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.
STOP
Test Step 4. CHECK IF THE DIAGNOSTIC CODE REMAINS
- Inspect the contacts of the harness connectors and clean the harness connectors.
- Reconnect all the harness connectors.
- Turn the battery disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 0673 FMI 08.
Expected Result:
The CID 0673 FMI 08 is active.
Results:
- YES - The CID 0673 FMI 08 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. Refer to Systems operation, Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace" for the machine that is being serviced.
STOP
- NO - The CID 0673 FMI 08 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