Toyota 4Runner: System Diagram
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
System Description
SYSTEM DESCRIPTION
1. GENERAL
(a) The air conditioning system has the following controls.
Control
Outline
Neural Network Control
This control is ca ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use these procedures to troubleshoot the air conditioning system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO W ...
Other materials about Toyota 4Runner:
Blower Motor Circuit
DESCRIPTION
The blower with fan motor sub-assembly operates according to signals from the
air conditioning amplifier assembly. The blower with fan motor sub-assembly speed
signals are transmitted by changes in the duty ratio.
Duty Ratio:
The duty rati ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" ...
0.0089