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:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE HOOD TO RADIATOR SUPPORT SEAL (a) Using a clip remover, remove the 7 clips and hood to radiator support seal. NOTICE: If the clips are damaged or fall off, replace them with new clips. ...

Wireless remote control/electronic key battery
Replace the battery with a new one if it is depleted. You will need the following items: • Flathead screwdriver • Lithium battery CR2016 (vehicles without a smart key system), or CR1632 (vehicles with a smart key system) Replacing the battery (vehic ...