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 |
|---|---|---|
|
Noise |
Oil (Level low) |
|
|
Oil (Wrong) |
|
|
|
Transfer faulty |
|
|
|
Oil leakage |
Oil (Level too high) |
|
|
Gasket (Damaged) |
|
|
|
Oil seal (Worn or damaged) |
|
|
|
O-ring (Worn or damaged) |
|
|
|
Hard to shift or does not shift |
Shifting key spring (Damaged) |
|
|
Synchronizer spring (Worn or damaged) |
|
|
|
4WD indicator light does not come on |
Harness or connector |
|
|
Combination meter |
|
|
|
CAN communication system |
|
|
|
Four wheel drive control ECU |
|
|
|
Transfer indicator switch (for 4WD position) |
|
|
|
4WD indicator light remains on |
Four wheel drive control ECU |
|
|
Transfer indicator switch (for 4WD position) |
|
|
|
Combination meter |
|
|
|
Shift from 2WD (H2) to 4WD (H4) is impossible |
Transfer indicator switch (for 4WD position) |
|
|
A.D.D. actuator |
|
|
|
Harness or connector |
|
|
|
ECM |
|
|
|
Four wheel drive control ECU |
|
|
|
Shift from 4WD (H4) to 2WD (H2) is impossible |
Transfer indicator switch (for 4WD position) |
|
|
A.D.D. actuator |
|
|
|
Harness or connector |
|
|
|
ECM |
|
|
|
Four wheel drive control ECU |
|
|
|
Shift from 4WD (H4) to 4WD (L4) is impossible |
Transfer indicator switch (for 4WD position) |
|
|
Transfer indicator switch (for L4 position) |
|
|
|
Transfer indicator switch (for neutral position) |
|
|
|
Harness or connector |
|
|
|
ECM |
|
|
|
Shift from 4WD (L4) to 4WD (H4) is impossible |
Transfer indicator switch (for 4WD position) |
|
|
Transfer indicator switch (for L4 position) |
|
|
|
Transfer indicator switch (for neutral position) |
|
|
|
Harness or connector |
|
|
|
ECM |
|
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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:
Accumulator Low Pressure (C1256)
DESCRIPTION
Refer to DTC C1254 (See page ).
DTC Code
DTC Detection Condition
Trouble Area
C1256
The fluid pressure inside the accumulator is below the standard value.
Brake b ...
Front Airbag Sensor
Components
COMPONENTS
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. CHECK FRON ...
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