Toyota 4Runner manuals

Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Window Defogger System / 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

NEXT

2.

INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.


NEXT

3.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Check if the CAN communication system is functioning normally (See page ).


Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM


A

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


A

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


A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU (See page ).


(b) Data List / Active Test (See page ).



NEXT

7.

REPAIR OR REPLACE

NEXT

8.

CONFIRMATION TEST

NEXT

END
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