SYSTEM DIAGRAM The configuration of the electronic control system for the A760E automatic transmission is as shown in the following chart. 
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Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Theft Deterrent System Communication Line High Fixation (B279A)
DESCRIPTION When the communication line (EFIO-IMI) between the transponder key ECU assembly and ECM is stuck on HI output, the ECM stores this DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B279A Theft Deterrent System Communication Line High Fixation The communication line (E ...
