TIE-CABLE 3264516 - Caterpillar

Illustration 1 g01459593
Schematic of the Oil Pressure Sensor (Center Steering Pump)This diagnostic code is associated with the oil pressure sensor (Center Steering Pump). The FMI 03 means that the ECM has determined that the voltage of the circuit for the sensor is above normal. The pressure sensors are PWM sensors. The PWM signal is dependent on the input pressure and the PWM signal will vary.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: 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 2414 FMI 03 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.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 7X-1710 Multimeter Probe along the voltage supply wire (contact A).
Measure the voltage from contact A to frame ground.Expected Result:The voltage is system voltage.Results:
OK - The voltage is system voltage. Proceed to Test Step 2.
NOT OK - The voltage is not system voltage. The + battery