Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use these procedures to troubleshoot the lighting 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 FOR DTC*

(a) Check for DTCs (See page ).

(b) Clear the DTCs (See page ).

Result	Proceed to
DTC output does not reoccur	A
DTC output reoccurs	B

GO TO STEP 6

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) Operation Check (See page ).

(b) Terminals of ECU (See page ).

6.	ADJUST, REPAIR OR REPLACE

7.	CONFIRMATION TEST

END

System Description

SYSTEM DESCRIPTION 1. AUTOMATIC LIGHT CONTROL SYSTEM (a) General When the headlight dimmer switch is in the AUTO position, the automatic light control sensor detects ambient light levels and outp ...

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Toyota 4Runner: How To Proceed With Troubleshooting

System Diagram

System Description

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