PLATE AS 4907189 - Caterpillar

Table 1
Module     Contact     Wire    
Machine ECM     J1-10     944-OR    
Operator Display     8     944-OR    
Engine     23     944-OR    
Machine Security System     12     944-OR    
Product Link     5     944-OR    
Implement (Screed) ECM     J1-10     944-OR    
(RH Operator ECM)     J1-10     944-OR    
Measure the resistance from connector J1-20 (wire 945-BR) of the LH Operator ECM to the corresponding connector contacts:
Table 2
Module     Contact     Wire    
Machine ECM     J1-20     945-BR    
Operator Display     9     945-BR    
Engine     24     945-BR    
Machine Security System     11     945-BR    
Product Link     6     945-BR    
Implement (Screed) ECM     J1-20     945-BR    
(RH Operator 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: It is unlikely that the ECM has failed. Exit this procedure and perform this diagnostic code procedure again.Prior to replacing an ECM, always contact your dealership's "Technical Communicator" 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 Testing and Adjusting, "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