TREAD 3S8706 - Caterpillar

Illustration 1 g03097076
Schematic of the Cat Data LinkThis diagnostic code is caused by abnormal communications between the Hydraulic Pump ECM and the engine ECM through the Cat Data Link. The update rate is not correct. Check if a diagnostic code that is related to the data link of the machine or the Engine ECM is present. If a diagnostic code is present, correct the related diagnostic code.A possible cause of this diagnostic code is that the Hydraulic Pump ECM is operating intermittently.The Cat Data Link is an input and output of all electronic control modules. The data link is designed to carry communications between the electronic control module and the service tool. The data link is not a visible component. The data link consists of internal control circuits and the connecting harness wiring. Test Step 1. CHECK THE BATTERY VOLTAGE AT THE ECM.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect