Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Engine does not Start but Initial Combustion Occurs
DESCRIPTION If the key ID codes of the key and transponder key ECU assembly match, the engine immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts. WIRING DIAGRAM CAUTION / NOTICE ...
