GASKET KIT 8C8746 - Caterpillar

Illustration 1 g01447509
Connections of the transmission oil temperature sensorThis diagnostic code is associated with the transmission oil temperature sensor. The FMI 03 means that the ECM has determined that the voltage of the circuit for the sensor is above normal.The possible causes of this diagnostic code are listed below:
The signal circuit for the sensor is open.
The signal circuit for the sensor is shorted to the +battery circuit.
The sensor has failed.
The power circuit or the ground circuit has failed.
The ECM has failed. This is unlikely.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all of the connections in the circuit are clean and secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.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 03 is active before performing this procedure. Note: Use a digital multimeter for the measurements in this procedure.System Response:When this diagnostic code occurs, the diverter solenoid for brake oil is turned off.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
Turn the key start switch and the disconnect switch to the ON position.
At the back of the harness connector for the sensor, insert a multimeter probe along the voltage supply wire (contact 1).
Measure the voltage from contact 1 to frame ground.Expected Result:The voltage is 5 DCV.Results:
OK - The voltage is 5 DCV. Proceed to Test Step 2.
NOT OK - The voltage is not 5 DCV. The + battery circuit in the machine harness has failed.Repair: Replace the machine harness or repair the machine harness.STOPTest Step 2. CHECK FOR PROPER GROUND AT THE SENSOR.
The machine harness remains connected to the sensor.
Turn the key start switch and the disconnect switch to the OFF position.
At the back of the harness connector for the sensor, insert a multimeter probe along the ground wire (contact 2).
Measure the resistance from contact 2 to frame ground.Expected Result:The resistance is less