Toyota Tundra Service Manual: System Diagram

SYSTEM DIAGRAM

Transmitting ECU (Transmitter)	Receiving ECU	Signal	Communication Method
Skid control ECU	4 wheel drive control ECU	Wheel speed sensor error signal Wheel speed signal Vehicle wheel sensor power supply decline status signal Vehicle speed signal	CAN communication system
ECM	4 wheel drive control ECU	Shift position P signal Shift position N signal	CAN communication system
4 wheel drive control ECU	Combination meter assembly	4WD indicator ON and flashing request signal L4 indicator ON and flashing request signal Buzzer sound demand signal	CAN communication system
4 wheel drive control ECU	Skid control ECU	Motor energizing signal 4WD status signal L4 status signal	CAN communication system
4 wheel drive control ECU	ECM	Cruise control cancel request signal 4WD status signal	CAN communication system

Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Transponder Chip Malfunction (B2793,B2794,B2797,B2798)
DESCRIPTION DTC B2793 is stored when a malfunction is found in the key during key ID code registration or a key ID code is not registered normally. Replace the key if key ID code registration cannot be performed normally and this DTC is output. DTC B2794 is stored when a key with an incomplete key I ...

Toyota Tundra Owners Manual