GEAR-COUPLING 1994719 - Caterpillar

Illustration 1 g01226081
Starter motor relay connections
Illustration 2 g01226117
Starter motor relay location in the fuse enclosure (1) Starter motor relay (2) Start motor contact (3) Buss bar "C" contact (4) Main relayThis diagnostic code is associated with the starter motor relay. The FMI 06 means that the ECM has determined that the current of the relay is above normal.The possible causes of this diagnostic code are listed:
The energize circuit of the relay is shorted to ground.
The relay 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 these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0444 FMI 06 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code is active, the ECM will turn off the current to the failed relay.Note: The coil resistance of the start relay should measure 27.3 3 ohms at 20 °C (68.0 °F). Test Step 1. CHECK THE RELAY
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the start relay with from the machine harness.Expected Result:CID 0444 FMI 06 changes to CID 0444 FMI 05 when the relay is disconnected.Results:
YES - CID 0444 FMI 06 changes to CID 0444 FMI 05 when the relay is disconnected. The circuit is correct.Repair: The relay has failed. Repeat this test "CHECK THE RELAY" in order to verify the failure of the relay. Replace the relay.STOP
NO - CID 0444 FMI 06 remains active. Proceed to Test Step 2.Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE RELAY FOR A SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFF position.
The relay remains disconnected from the machine harness.
Disconnect the machine harness connectors from the ECM.
At the machine harness connector, measure the resistance from the signal contact J1-7 (wire 306-GN) to all contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J2-7 (wire 306-GN) and the circuit with the low resistance measurement.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors and clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Enter service mode of the Caterpillar Monitoring System and clear all inactive diagnostic codes.
Operate the machine.
Check the status of the CID 0444 FMI 06 diagnostic code.Expected Result:The CID 0444 FMI 06 diagnostic code is active.Results:
YES - The CID 0444 FMI 06 diagnostic code is active. The diagnostic code