Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Steering / Steering Column / Steering Lock System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedures to troubleshoot the steering lock system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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 DTC*

(a) Check for DTCs and make a note of any codes that are output (See page ).

(b) Clear the DTCs (See page ).

(c) Recheck for DTCs (See page ). Based on the
DTCs output above, try to cause the output of the same wireless door lock control system DTC, LIN communication system DTC, steering lock system DTC, engine immobiliser system DTC or smart key system (for entry function) DTC by reproducing the symptoms indicated by the DTC.

Result	Proceed to
DTC is not output.	A
Wireless door lock control system DTC is output.	B
LIN communication system DTC is output.	C
Steering lock system DTC is output.	D
Engine immobiliser system DTC is output.	E
Smart key system (for entry function) DTC is output.	F

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

GO TO LIN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

GO TO DIAGNOSTIC TROUBLE CODE CHART

GO TO ENGINE IMMOBILISER SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

GO TO SMART KEY SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

4.	PROBLEM SYMPTOMS TABLE

(a) Refer to 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

GO TO STEP 6

5.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU (See page ).

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

6.	REPAIR OR REPLACE

7.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM Input and Output Signal of Each ECU Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signal Communication Method P ...

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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