WRENCH-IMPACT 2223053 - Caterpillar

Illustration 1 g03742978
Schematic of the speed sensor (transmission output)This diagnostic code is associated with the speed sensor (transmission output). The FMI 01 means that the ECM has determined that the signal from the transmission output speed sensor is below normal operating range. The transmission output speed sensor is a frequency sensor. The frequency of the signal increases as the transmission output speed increases. The possible causes of this diagnostic code are listed below:
The speed sensor has failed.
The signal circuit of the speed sensor is shorted to the ground.
The speed sensor is out of adjustment.
The ECM has failed. (ECM failure is unlikely.)Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0191 FMI 01 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter (or equivalent multimeter) for the measurements in this procedure. Test Step 1. INSPECT THE SPEED SENSOR
Perform a visual inspection of the sensor, the wiring for the sensor, and the hardware that is associated with the sensor. ReferenceTesting and Adjusting, "Electrical Connector - Inspect" in this manual. Expected Result:There is no apparent damage to the sensor, the wiring for the sensor, or the hardware that is associated with the sensor. Results:
YES - There is no apparent damage to the sensor, the wiring for the sensor, or the hardware that is associated with the sensor. Proceed to Test Step 2.
NO - There is apparent damage to the sensor, the wiring for the sensor, or the hardware that is associated with the sensor. Repair: Replace the damaged part. Proceed to Test Step 8. Test Step 2. CHECK FOR A SHORTED SPEED SENSOR
Turn the disconnect switch to the OFF position.
Disconnect the harness from the speed sensor.
At the sensor, measure the resistance between each connector contact and the case of the sensor. Expected Result:The resistance of either measurement is greater than 5 ohms. Results:
YES - Resistance of either measurement is greater than 5 ohms. Proceed to Test Step 3.
NO - Resistance of either measurement is less than 5 ohms. The sensor has failed. Repair: Replace and adjust the speed sensor. Refer to Testing and Adjusting, "Speed Sensor - Adjust" in this manual. STOPTest Step 3. CHECK THE RESISTANCE AT THE SPEED SENSOR
The disconnect switch remains in the OFF position and the speed sensor remains disconnected from the harness.
At the sensor, measure the resistance between the two contacts of the connector.Expected Result:The resistance should be approximately 1075 ohms.Results:
YES - Resistance is approximately 1075 ohms. Proceed to Test Step 4.
NO - Resistance is not approximately 1075 ohms. The sensor has failed. Repair: Replace and adjust the speed sensor. Refer to Testing and Adjusting, "Speed Sensor - Adjust" in this manual. STOPTest Step 4. CHECK FOR A SHORTED HARNESS
The disconnect switch remains in the OFF position and the speed sensor remains disconnected from the harness.
Disconnect the harness from the Power Train ECM.
At the harness connector for the Power