DISC 0516089 - Caterpillar

Illustration 1 g03673300
Schematic of the "Transmission Gear Lever Selector Sensor "Note: This procedure is for machines equipped with the standard gear selector. If an optional gear shifter sensor is used, refer to the main electrical schematic for detailed information.This diagnostic code is associated with the "Transmission Gear Lever Selector Sensor ". The FMI 04 diagnostic code 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. A failure of the ECM 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 0702 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 2.
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 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 3 (wire 126-PK) for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact 3 (wire 126-PK) to contact 1 (wire 200-BK).Expected Result:The voltage is between 9 VDC and 32 VDC.Results:
OK - The voltage is between 9 VDC and 32 VDC. Proceed to Test Step 3.
NOT OK - The voltage is NOT between 9 VDC and 32 VDC. The circuit is open. Repair: Check the continuity of fuse for the energize circuit. If the fuse is good, Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE SIGNAL OF THE SENSOR
Turn the key start switch and the disconnect switch to the OFF position.
The multimeter probe remains along contact 1 (wire 200-BK).
At the back of the harness connector for the sensor, insert the other multimeter probe along contact 5 (wire E946-OR).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the digital multimeter.
Without disconnecting the sensor or the hardware that is associated with the sensor from the machine, take the sensor through the full operating range.Expected Result:The signal of the sensor responds in the manner that is described