Toyota 4Runner: 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.
|
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) |
|
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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:
Downhill Assist Control Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE DRIVE MONITOR SWITCH
2. REMOVE MAP LIGHT ASSEMBLY
3. REMOVE DOWNHILL ASSIST CONTROL SWITCH
(a) Disconnect the 2 connectors.
...
PTC Heater Circuit
DESCRIPTION
PTC heater relays are closed in accordance with signals from the air conditioning
amplifier assembly and power is supplied to the quick heater assembly installed
on the radiator heater unit.
WIRING DIAGRAM
PROCEDURE
1.
...
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