U0001 U0001/A2 High Speed CAN Communication Bus

[Tagne]

HELLO I SCAN TOYOTA COROLA DENSO 2004 I HAVE THIS CODE U0001 I KNOW IS COMMUNICATION PROBLEM BETWEEN TCM AND ECM
PROBLEM IS GEARBOX DOESN T CHANGE
I NEED SOLUTION TO SOLVE IT. I SAID TO COSTUMER TO CHANGE TCM TO SOLVE IT BUT AM NOT SURE
PLZ NEED HELP...

[Tagne]

nobody can help

[Dunker]

Scope the CAN bus wires between the modules first to see if the waveform is distorted (might be best to break into the wires with both modules connected).