Toyota 4Runner manuals

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:

Short to Battery in Motor RH Circuit (25,26)
DESCRIPTION When there is a short to battery in the side auto step motor circuit, the side auto step controller ECU assembly will not operate the automatic running board. DTC No. Detection Condition Trouble Area ...

Open in CAN Main Wire
DESCRIPTION There may be an open circuit in the CAN main wire and/or DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher. Symptom Trouble Area The resistance be ...

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