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 |
|---|---|---|
|
Oil leakage from front differential |
Oil (Level too high or wrong grade) |
|
|
Front differential rear oil seal (Worn or damaged) |
|
|
|
Companion flange (Loose or damaged) |
|
|
|
Oil leakage from rear differential |
Oil (Level too high or wrong grade) |
|
|
Rear differential front oil seal (Worn or damaged) |
|
|
|
Companion flange (Loose or damaged) |
|
|
|
Oil leak from front drive pinion shaft |
Oil (Level too high or wrong grade) |
|
|
Front differential oil seal (Worn or damaged) |
|
|
|
Companion flange (Loose or damaged) |
|
|
|
Oil leak from rear drive pinion shaft |
Oil (Level too high or wrong grade) |
|
|
Rear differential oil seal (Worn or damaged) |
|
|
|
Companion flange (Loose or damaged) |
|
|
|
Differential lock does not operate |
Rear differential lock switch |
|
|
Four wheel drive control ECU |
|
|
|
Differential carrier (Faulty) |
- |
|
|
Wiring or ground (Faulty) |
- |
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System Diagram
SYSTEM DIAGRAM
...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK 4WD CONTROL ECU
(a) Measure the voltage and resistance according to the value(s) in the table
below.
Terminal No. (Symbol)
Wiring Color
...
Other materials about Toyota 4Runner:
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
2. REMOVE FRONT BUMPER COVER (w/o Intuitive Parking Assist System ...
Intuitive parking assist
The distance from your vehicle to nearby obstacles when parallel parking
or maneuvering into a garage is measured by the sensors and communicated via an
indicator and a buzzer. Always check the surrounding area when using this
system.
Types of sensors
...
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