AXLE AS-UNDERCARRIAGE 3594272 - Caterpillar

Illustration 1 g01197805
Schematic for the Cat Data LinkThis diagnostic code is recorded when the Implement ECM cannot communicate with the Caterpillar Monitoring System via the Cat Data Link. The update rate from the ECM is not correct.The possible causes for this diagnostic code are listed:
The data link wire between the implement ECM and the Caterpillar Monitoring System has failed.System Response:The machine response is listed:
All functions will be disabled. This is true only if the ECM has never been powered up.Note: Ensure that the diagnostic code is active.Test Step 1. CHECK THE COMPATIBILITY OF THE SOFTWARE.
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:
YES - The software is compatible. Proceed to Test Step 2.
NO - The software is not compatible.Repair: Flash the proper software to the appropriate ECM. Cycle the key switch in order to initialize the new software. Ensure that the diagnostic code is no longer active. If this repair does not resolve the problem, proceed to Test Step 2.Test Step 2. CHECK THE +BATTERY CIRCUIT AT THE ECM CONNECTORS.
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
Disconnect connector J1 from the ECM.
At the connector J1, measure the voltage between the possible sources of + battery and possible sources of ground.Expected Result:The voltage measures 18 DCV to 35 DCV.Results:
YES - The voltage measures 18 DCV to 35 DCV. The voltage is correct. Proceed to Test Step 3.
NO - The voltage measures less than 18 DCV.Repair: Ensure that there is a proper ground. Also, check the circuit breakers. If the ground is proper, the power circuit has failed. Repair the power circuit or replace the power circuit. The power circuit is contact 31 (wire 121-RD). If the problem is not resolved, then proceed to Test Step 4.Test Step 3. CHECK FOR A CAT DATA