PUMP GP-DIESEL EXHAUST FLUID 3984747 - Caterpillar

Which Generate This Code:The master Electronic Control Module (ECM) has sent ten consecutive messages to the slave ECM via the Cat Data Link. None of the messages have been received by the slave ECM. Alternatively, the master ECM has sent messages to the slave ECM over a period of time, and two-thirds of the messages have not been received by the slave ECM. Neither ECM is being flashed.Note: Although there is a failure to communicate with the slave ECM, the master ECM may still be able to communicate with the Caterpillar Electronic Technician (ET).System Response:The alarm output is activated. The code is logged by the slave ECM.Engine ignition is terminated.Note: If Cat ET cannot communicate with the master ECM, the values will display "Unavailable".The engine is shut down.Test Step 1. Perform the following diagnostic procedure: Cat Data LinkResults:
OK - STOP