Toyota 4Runner: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the push-button start function.
- *: Use the Techstream.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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.gif)
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2. |
CUSTOMER PROBLEM ANALYSIS CHECK |
HINT:
- In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
- The following 5 items are important points in the problem analysis:
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions?
Running conditions, driving conditions, weather conditions
How did it happen?
Problem symptoms
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3. |
INSPECT BATTERY VOLTAGE |
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
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4. |
INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
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Result |
Proceed to |
|---|---|
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CAN DTC is not output |
A |
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CAN DTC is output |
B |
| B | .gif) |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
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5. |
CHECK FOR DTC* |
(a) Check for DTCs and note any codes that are output (See page
.gif)
).
(b) Clear the DTCs (See page ).
(c) Recheck for DTCs.
|
Result |
Proceed to |
|---|---|
|
DTC is not output again |
A |
|
DTC is output again |
B |
| B | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
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|
6. |
INSPECT BASIC OPERATION |
(a) Check that the engine can be started by the basic operation.
(1) Push the engine switch when the brake pedal is depressed and the shift lever is in P. Check that the engine starts.
OK:
Engine starts.
(b) Check that the engine switch mode can be changed by pushing the engine switch.
(1) Without depressing the brake pedal, push the engine switch repeatedly. Check that the power source mode turns from off to on (ACC) to on (IG) and back to off.
OK:
Power source mode changes as described above.
(2) With the brake pedal depressed and the shift lever in P, push the engine switch. Check that the engine starts normally from any power source mode status.
OK:
Engine starts normally from any power source mode status.
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7. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to the Problem Symptoms Table (See page
).
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Result |
Proceed to |
|---|---|
|
Fault is not listed in the problem symptoms table |
A |
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Fault is listed in the problem symptoms table |
B |
| B | |
GO TO STEP 9 |
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8. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU (See page ).
(b) Data List/Active Test (See page ).
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9. |
REPAIR OR REPLACE |
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10. |
CONFIRMATION TEST |
| NEXT | |
END |
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitting ECU
(Transmitter)
Receiving ECU
(Receiver)
Signal
Line
ECM
Power manage ...
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 lis ...
Other materials about Toyota 4Runner:
Removal
REMOVAL
PROCEDURE
1. REMOVE UPPER RADIATOR SUPPORT SEAL
2. REMOVE FRONT BUMPER COVER
(a) Put protective tape around the front bumper cover.
(b) Remove the 3 bolts, 10 screws and 6 clips.
(c) Detach the 14 claws to remove the front bumper cover with ra ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because in ...
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