Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / 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" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

LIN Communication System

Symptom	Suspected Area	See page
Air conditioning switch does not operate	LIN communication line
	Air conditioning system (for Automatic Air Conditioning System)
	Air conditioning system (for Manual Air Conditioning System)

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the LIN communication system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION BLOCK ASSEMBLY (a) Remove the main body ECU (multiplex network body ECU) from the driver side junc ...

Other materials about Toyota 4Runner:

Rear window and outside rear view mirror defoggers
Defoggers are used to defog the rear window, and to remove raindrops, dew and frost from the outside rear view mirrors. Before operating the defoggers, make sure the back window is completely closed. Vehicles with a manual air conditioning system Tu ...

Acceleration Sensor Power Supply Voltage Malfunction (C1381)
DESCRIPTION The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. The yaw rate sensor has a built-in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2). If ...