SHAFT AS 4169089 - Caterpillar

Illustration 1 g02162653
Schematic of the L Material Height Dial of the Implement ECMThis diagnostic code is associated with the L Material Height Dial. The FMI 04 means that the Implement (Screed) ECM has determined that the voltage of the circuit for the material height dial is below normal. Note: The Implement (Screed) ECM is located under the Screed Platform.The possible causes of this diagnostic code are listed below:
The signal circuit for the material height dial is shorted to ground.
The material height dial has failed.
The ECM has failed. This situation is unlikely. 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 connections in the circuit are clean, that all connections are secure and that all connections are in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.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 0978 FMI 04 is active before performing this procedure. Note: Use a digital multimeter for the measurements in this procedure.System Response:When this diagnostic code is active, the following occurs:
Left material height setting will remain at pre-fault setting until the propel lever returns to neutral.
When the propel lever returns to neutral, material height setting will be 50%
Operator station fault lamp is active.Test Step 1. CHECK THE L MATERIAL HEIGHT DIAL
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the L Material Height Dial from the machine harness.
Connect positive (Red) lead of a multimeter to the "B" contact of the Dial connector.
Connect the negative (Black) lead of the multimeter to "C" contact of the Dial connector.
Rotate the Dial from full counter-clockwise (Minimum) position to full clockwise (Maximum) position.Expected Result:The resistance should start at 0 ohms at the minimum setting of the Dial. As the Dial is rotated, the resistance will increase to 1000 200 ohms at the maximum dial setting.Results:
OK - The resistance should start at 0 ohms at the minimum setting of the speed dial. As the Dial is rotated, the resistance will increase to 1000 200 ohms at the maximum dial setting. The Dial is operating correctly. Proceed to Test Step 2.
NOT OK - The resistance measurements for the dial are NOT correct.Repair: Replace the L Material Height Dial.STOPTest Step 2. CHECK THE WIRING HARNESS OF THE L MATERIAL HEIGHT DIAL FOR A SHORT TO GROUND.
The key start switch and the disconnect switch remain in the OFF position.
The Dial remains disconnected from the machine harness.
Disconnect the J1 machine harness connector from the ECM.
At the machine harness connector for the ECM, measure the resistance from the signal contact J1-22 (wire M906- BU) of the machine harness to all possible sources of ground. Measure the resistance to