WASHER 4209905 - Caterpillar

Table 1
Module     Contact     Wire    
Machine ECM     J1-10     944-OR    
Monitoring System ECM     8     944-OR    
Engine ECM     23     944-OR    
Machine Security System     12     944-OR    
Product Link     5     944-OR    
LH Operator ECM     J1-10     944-OR    
Implement (Screed) ECM     J1-10     944-OR    
Measure the resistance from connector J1-20 (wire 945-BR) of the RH Operator ECM to the corresponding connector contacts:
Table 2
Module     Contact     Wire    
Machine ECM     J1-20     945-BR    
Monitoring System ECM     9     945-BR    
Engine ECM     24     945-BR    
Machine Security System     11     945-BR    
Product Link     6     945-BR    
LH Operator ECM     J1-20     945-BR    
Implement (Screed) ECM     J1-20     945-BR    Expected Result:The resistance that is measured is less than 5 ohms for each measurement.Results:
OK - The resistance that is measured is less than 5 ohms for each measurement. The data link circuit is correct. The ECM may have failed.Repair: Failure of the ECM is unlikely. Exit this procedure and perform this diagnostic code procedure again.Prior to replacing an ECM, always contact the Technical Communicator for your dealer for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the cause of the diagnostic code is not found and the ECM must be replaced, refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".STOP
NOT OK - The resistance that is measured is greater than 5000 ohms for one or more of the measurements. The machine harness has failed.Repair: The data link circuit is open in the machine harness. Repair the machine harness or replace the machine harness. Verify that the repair eliminates the problem.STOP