Toyota 4Runner: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Inspect the window defogger system after confirming that the back door power window system of the power window control system is operating normally.
- Use these procedures to troubleshoot the window defogger system.
- *: Use the Techstream.
PROCEDURE
|
1. |
VEHICLE BROUGHT TO WORKSHOP |
|
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|
2. |
INSPECT BATTERY VOLTAGE |
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
|
|
3. |
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Check if the CAN communication system is functioning normally (See page
.gif)
).
|
Result |
Proceed to |
|---|---|
|
CAN DTC is not output |
A |
|
CAN DTC is output |
B |
| B | .gif) |
GO TO CAN COMMUNICATION SYSTEM |
|
|
4. |
CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Check if the LIN communication system is functioning normally.
|
Result |
Proceed to |
|---|---|
|
LIN DTC is not output |
A |
|
LIN DTC is output |
B |
| B | |
GO TO LIN COMMUNICATION SYSTEM |
|
|
5. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to the Problem Symptoms Table (See page
).
|
Result |
Proceed to |
|---|---|
|
Fault is not listed in problem symptoms table |
A |
|
Fault is listed in problem symptoms table |
B |
| B | |
GO TO STEP 7 |
|
|
6. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU (See page ).
(b) Data List / Active Test (See page ).
|
|
7. |
REPAIR OR REPLACE |
|
|
8. |
CONFIRMATION TEST |
| NEXT | |
END |
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitter
Receiver
Signal
Line
Heater control assembly
Air conditioning amplifier assemb ...
Operation Check
OPERATION CHECK
1. CHECK WINDOW DEFOGGER SYSTEM OPERATION
(a) When the ignition switch is turned to ON and the heater control (window defogger
switch) is pressed, check that the window defogger op ...
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Inspection
INSPECTION
PROCEDURE
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(b) Carefully look at the foreign matter and particles in the pan and on the
magnets to anticipate the type of wea ...
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