SOFTWARE GP- 2139334 - Caterpillar

Illustration 1 g01446636
Schematic of the Cat Data LinkThis diagnostic code is recorded when the Power Train ECM cannot communicate with the Implement ECM via the Cat Data Link. The update rate from the ECM is not correct.The Cat Data Link is an input and an output of all modules. The Cat Data Link is designed to enable communications for all electronic control modules and service tools. The Cat Data Link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring.System Response:Digging performance may be reduced.Test Step 1. CHECK THE COMPATIBILITY OF THE SOFTWARE.
Verify that the software is compatible. For the correct software part numbers, refer to the Electronics Groups in the parts manual for the machine that is being serviced. Expected Result:The software is compatible.Results:
OK - The software is compatible. Proceed to test step 2.
NOT OK - The software is NOT compatible.Repair: Install the correct software. Ensure that the correct part number was used if any electronic control modules have been replaced. Continue if the conditions are not resolved. STOPTest Step 2. CHECK THE +BATTERY CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect connector J1 from the ECM.
Turn the disconnect switch and the key start switch to the ON position.
At connector J1, measure the voltage from +battery terminals to the negative battery terminals. Expected Result:The voltage should measure 18 to 35 DCV.Results:
OK - The voltage is correct. The ECM is receiving the voltage. Proceed to test step 3.
NOT OK - The voltage does NOT measure 18 to 35 DCV.Repair: The ECM is NOT receiving the correct voltage. Ensure that proper ground is available. If the ground is correct, repair the power circuit. Also, check the circuit breakers. If conditions are not resolved proceed to test step 3.Test Step 3. CHECK THE DATA LINK CIRCUIT FOR A SHORT TO GROUND.
Turn the key start switch and the disconnect switch to the OFF position.
Inspect the machine harness connectors that are related to the circuits of the Cat Data Link. Ensure that the connector contacts are clean and tight.
Disconnect the machine harness from all modules.
At the machine harness connector for the ECM, measure the resistance from contact J1-20 (wire 892-BR) and contact J1-10 (wire 893-GN) to all possible sources of ground. Expected Result:The resistance should be greater than 5000 ohms for each measurement.Results:
OK - The resistance measurement is correct. The machine harness is correct. Proceed to test step 4.
NOT OK - The resistance measurement is not correct.Repair: There is a short in the machine harness. The short is between J1-20 (wire 892-BR) and the circuit with the low resistance measurement or the short is between J1-10 (wire 893-GN) and the circuit with the low resistance measurement. Repair the harness or replace the harness. If conditions are not resolved, replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". If the problem remains present, exit this procedure and perform this procedure again.STOPTest Step 4. CHECK THE CAT DATA