Toyota 4Runner manuals

Toyota 4Runner: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the LIN communication 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.

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, inspect the CAN communication function to make sure that there are no malfunctions in the communication system (See page ).


Result

Proceed to

No DTCs are output

A

DTCs are output

B


B

GO TO CAN COMMUNICATION SYSTEM


A

4.

INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Using the Techstream, inspect the LIN communication function to make sure that there are no malfunctions in the communication system (See page ).


Result

Proceed to

No DTCs are output

A

DTCs are output

B


B

GO TO DIAGNOSTIC TROUBLE CODE CHART


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) Data List/Active Test (See page ).


(b) Terminals of ECU (See page
).



NEXT

7.

ADJUST, REPAIR OR REPLACE


NEXT

END

System Description
SYSTEM DESCRIPTION 1. LIN COMMUNICATION SYSTEM DESCRIPTION The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed t ...

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 ...

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Terminals Of Ecu
TERMINALS OF ECU HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation. 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (a) Disconnect the cable fro ...

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