A760H Automatic Transmission

A760H AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM (for 4GR-FSE): U0100: Lost Communication with ECM / PCM "A"
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

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

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 / ECT / Trouble Codes".

(d) Read the DTCs using the Techstream.

Result:





B -- GO TO DTC CHART

A -- REPLACE ECM