Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Vehicle Exterior / Exterior Panels / Trim / Automatic Running Board System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use these procedures to troubleshoot the automatic running board system.

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 and make a note of any codes that are output.

Result	Proceed to
No DTCs are output	A
DTC is output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

4.	PROBLEM SYMPTOMS TABLE

(a) Refer to the Problem Symptoms Table (See page ).

Result	Proceed to
Fault not listed in problem symptoms table	A
Fault 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.	REPAIR OR REPLACE

7.	CONFIRMATION TEST

END

Operation Check

OPERATION CHECK 1. CHECK AUTOMATIC RUNNING BOARD OPERATION (a) When side auto step switch assembly is "AUTO", the operation and condition of this control are described below. Check that ...

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Inspection
INSPECTION PROCEDURE 1. INSPECT VANE PUMP SHAFT AND BUSH IN VANE PUMP FRONT HOUSING (a) Using a micrometer, measure the outer diameter of the vane pump shaft. Text in Illustration *a Outer Diameter ...

Short in Motor LH (11,12)
DESCRIPTION When there is a short in the side auto step motor circuit, the side auto step controller ECU assembly halts the operation of the automatic running board. DTC No. Detection Condition Trouble Area ...

Toyota 4Runner: How To Proceed With Troubleshooting

System Diagram

Operation Check

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