Toyota Tundra Service Manual: System Diagram

SYSTEM DIAGRAM

Communication table

Sender	Receiver	Signal	Line
Air Conditioning Control Assembly	Air Conditioning Amplifier	Air conditioning control signal	LIN
ECM	Air Conditioning Amplifier	Engine speed Engine coolant temperature signal	CAN

Toyota Tundra Service Manual > Sfi System: Open in Secondary Air Injection System Heater Control Circuit (P144C,P144D)
DESCRIPTION The ECM operates the air pump heater (AI HTR) relay which causes the air pump heater (AI HTR) to operate. DTC No. DTC Detection Condition Trouble Area P144C Open or short in the air pump heater (AI HTR) relay circuit for 5 seconds (1 trip detection logic). Open or short in air pump heate ...

Toyota Tundra Owners Manual