System Diagram
Communication Table Transmitter | Receiver | Signal | Communication Line |
|---|---|---|---|
Air conditioning amplifier assembly |
ECM |
A/C idle up request signal |
CAN |
Heater idle up request signal |
|||
PTC heater control request signal* |
|||
Electricity load at low voltage state signal |
|||
Ambient temperature signal |
|||
Main body ECU |
Air conditioning amplifier assembly |
Main body request signal |
|
Combination meter assembly |
Air conditioning amplifier assembly |
Vehicle speed signal |
|
ECM |
Air conditioning amplifier assembly |
Engine coolant temperature signal |
|
Engine speed data |
|||
Engine type information signal |
|||
Heater control assembly |
Air conditioning amplifier assembly |
AUTO operation switch signal |
LIN |
OFF operation switch signal |
|||
A/C switch signal |
|||
Front defroster operation switch signal |
|||
Rear defogger operation switch signal |
|||
Mode operation switch signal |
|||
REC/FRS switch signal |
|||
Set temperature switch signal |
|||
Blower operation switch signal (up, down) |
- *: w/ PTC Heater
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.