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 |
OFF operation switch signal |
LIN |
|
A/C switch signal |
|||
|
Rear defogger operation switch signal |
|||
|
Mode operation switch signal |
|||
|
REC/FRS switch signal |
|||
|
Set temperature switch signal |
|||
|
Blower operation switch signal |
- *: w/ PTC Heater
System Description
SYSTEM DESCRIPTION
1. GENERAL
(a) The air conditioning system has the following controls.
Control
Outline
Manual Control
The air conditioning ampli ...
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:
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignit ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
(e) Check for DTCs.
2. CLEAR DTC
(a) Conn ...
0.027