A960E Automatic Transmission

A960E AUTOMATIC TRANSMISSION SYSTEM: U0100: Lost Communication with ECM / PCM "A"

DTC U0100 - Lost Communication with ECM / PCM "A"

DESCRIPTION

The engine control unit and the transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control ECU with the Controller Area Network (CAN).
If there is a problem in this intercommunication, the ECM sets a DTC.






MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U0100)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) position and push the Techstream main switch ON.
(c) When you use Techstream:
Select the item "Powertrain / Engine and ECT / Trouble Codes".
(d) Read the DTCs using the Techstream.
Result:






B -- GO TO DTC CHART
A -- REPLACE ECM