Toyota 4Runner Quiz
Vehicle Exterior

How To Proceed With Troubleshooting

In this manual: Vehicle Exterior
General — 25Audio / Visual / Telematics — 283Brake — 187Drivetrain — 204Power Source / Network — 79Steering — 76Suspension — 130Vehicle Exterior — 391Vehicle Interior — 693
~1min read
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

  1. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT

  1. 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

  1. 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

  1. 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

  1. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU (See page ).


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


NEXT

  1. REPAIR OR REPLACE

NEXT

  1. CONFIRMATION TEST


NEXT

END

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.