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 > Air Conditioning System(for Manual Air Conditioning System): Blower Motor Circuit
DESCRIPTION The blower motor is operated by signals from the air conditioning amplifier. Blower motor speed signals are transmitted by changes in the duty ratio. Duty Ratio: The duty ratio is the ratio of the blower motor OFF time (B) to the total of the blower motor ON and OFF time (A + B). The blo ...

Toyota Tundra Owners Manual