LINK-TCK-RH- 2894951 - Caterpillar

Illustration 1 g02157109
Schematic for the Left Side Auxiliary pedal sensor This diagnostic code is associated with the Left Side Auxiliary pedal sensor. An FMI 03 diagnostic code means the Machine ECM has determined the signal output voltage of the sensor is above normal.Possible causes of this diagnostic code are listed below:
The sensor power supply may have failed.
The sensor may have failed.
The sensor output signal may be shorted to a voltage source.
The sensor output signal may be open.
The Machine ECM may have failed, but this situation is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes now, but clear those codes after the original diagnostic code has been corrected. Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all of the harness connectors involved in the circuit. Verify that all of the connections in the circuit are clean, secure, and in good condition. If a problem is found with any of the connections: correct the problem and verify that diagnostic code CID 1130 FMI 03 is still active, before performing the following procedures. Test Step 1. VERIFY THE +8 VDC SUPPLY.
Turn the key start switch and the disconnect switch to the ON position. Do not start the engine.
Do not disconnect any of the machine harness connectors at this time.
At the back of the harness connector for the Left Side Auxiliary pedal sensor: insert the 7X-1710 Multimeter Probes along contact 1 (E472-GN), the sensor contact for the +8 VDC supply, and contact 2 (235-BK), the sensor ground return.
Measure a DC voltage from contact 1 to contact 2. Expected Result:The voltage measurement is 8 0.5 VDC.Results:
YES - The voltage measurement is 8 0.5 VDC. The power supply is correct. Go to Test Step 2.
NO - The voltage is NOT 8 VDC. The 8 VDC power supply in the machine ECM has failed, or the machine harness has failed. Go to Test Step 3Test Step 2. CHECK THE SENSOR, THE ECM, AND THE CIRCUIT CONNECTIONS IN THE MACHINE HARNESS.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the Left Side Auxiliary pedal sensor.
At the harness connector for the Left Side Auxiliary pedal sensor, place a jumper wire between contact 3 (N794-GY) and contact 2 (235-BK) on the connector.
Turn the key start switch and the disconnect switch to the ON position. Do not start the engine.
Observe the status of the diagnostic code.Expected Result:The CID 1130 FMI 03 diagnostic code remains active. Results:
YES - The CID 1130 FMI 03 diagnostic code remains active. The jumper wire did not change the code. The sensor is NOT the cause of the problem. Repair: The machine harness has failed, or the ECM may have failed. Go to Test Step 3.
NO - The CID 1130 FMI 03 diagnostic code is no longer active, and has been replaced by an active CID 1130 FMI 04 diagnostic code. The ECM has detected a valid diagnostic