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:
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Stabilizer control ECU
Engine type information
Gear information
Drive train informat ...
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSION
HINT:
The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ign ...
0.0068