CARTRIDGE GP-TURBOCHARGER 2080022 - Caterpillar

Illustration 1 g02023595
Schematic of the Transmission Oil Temperature Sensor
This diagnostic code is associated with the Transmission Oil Temperature Sensor. The FMI 04 means that the ECM has determined that the voltage of the circuit for the position sensor is below normal. The possible causes of this diagnostic code are listed below:
The signal circuit for the sensor is shorted to ground.
The sensor has failed.
The ECM has failed. This 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 0177 FMI 04 is active before performing this procedure. Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. INSPECT THE SENSOR.
Perform a visual inspection of the sensor, the wiring for the sensor and the hardware that is associated with the sensor. 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:
OK - 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 3.
NOT OK - 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 2.Test Step 2. CHECK THE ADJUSTMENT AND/OR THE CALIBRATION OF THE SENSOR.
Turn the disconnect switch and the key start switch to the ON position.
Perform the calibration of the position sensor.
Check the status of the diagnostic code. Expected Result:The CID 0177 FMI 04 is not active.Results:
OK - The diagnostic is not active. The adjustment and/or the calibration has corrected the failure. Resume normal operation.STOP
NOT OK - CID 0177 FMI 04 is still active. Exit the calibration procedure. Proceed to Test Step 3.Test Step 3. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a multimeter probe along contact A (wire R800-OR(Orange)) for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact A (wire R800-OR(Orange)) to contact B (wire R998-BR(Brown)). Expected Result:The voltage is 8 VDC.Results:
OK - The voltage is 8 VDC. Proceed to Test Step 4.
NOT OK - The voltage is NOT 8 VDC. The circuit is open. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 4. CHECK THE SIGNAL OF THE SENSOR.
Table 1
Temperature Table for
Sensor Signal Duty Cycle
Temperature % Duty Cycle
3° C (37.4° F) 15.625
18° C (64.4° F) 21.875
23° C (73.4° F) 25
98° C (208.4° F) 81.25
Turn the key start switch and the disconnect switch to the OFF position.
Remove the multimeter probe along contact A from the previous Test Step.
Disconnect the harness connector at the sensor.
At the disconnected harness connector for the Transmission Oil Temperature Sensor, use a 151-6320 Removal Tool or a similar tool to remove the signal