RING G.-PISTON 9H1226 - Caterpillar

Illustration 1 g02359180
Schematic for the left brake pedal position sensor
This diagnostic code is associated with the left brake pedal position 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. The ECM failing 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 0737 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 THE VOLTAGE AT THE SENSOR.
Turn the disconnect switch and the key start switch to the ON position.
Disconnect the sensor from the harness.
At the harness connector for the sensor, measure the voltage between contact A (wire J850-WH(White)) and contact B (wire J764-BR(Brown)). Expected Result:The voltage measurement should be approximately battery voltage.Results:
YES - The voltage is approximately battery voltage. Proceed to Test Step 4.
NO - The voltage is not approximately battery voltage. There is an open in the harness. Proceed to Test Step 2.Test Step 2. CHECK FOR AN OPEN IN THE SUPPLY CIRCUIT.
The key start switch and the