Toyota 4Runner manuals

Toyota 4Runner: 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 listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Auto Running Board System

Symptom

Suspected Area

See page

The automatic running board does not function.

PRB fuse


Side auto step switch assembly


Proceed to "Side Auto Step ECU Power Source Circuit"


Proceed to "Side Auto Step Switch Circuit"


Proceed to "Door Courtesy Switch Circuit"


Side auto step controller ECU assembly


The automatic running board is not stowed even when the door is closed.

Proceed to "Door Courtesy Switch Circuit"


Side auto step controller ECU assembly

-

The automatic running board is not stowed even when the vehicle is moving.

Proceed to "Speed Signal Circuit"


Main body ECU (Multiplex network body ECU)

-

The automatic running board reverses operation during deploying or stowing movement.

Check that there is no foreign object blocking the automatic running board.

-

Check that there is no damage to the automatic running board link.

-

Side auto step motor assembly

-

Initialization
INITIALIZATION 1. INITIALIZE AUTOMATIC RUNNING BOARD SYSTEM NOTICE: When a side auto step controller ECU assembly is replaced, the side auto step controller ECU assembly must be initialized. Func ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Measure the voltage according to the value(s) in the table below. Ter ...

Other materials about Toyota 4Runner:

Invalid Data Received from Deceleration Sensor (C1442,C1443)
DESCRIPTION The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. DTC Code DTC Detection Condition Trouble Area C1442 An invalid data s ...

Power Steering ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Power Steering ECU Communication Stop Mode Either condition is met: "PPS" is not displayed on the "CAN Bus Check" sc ...

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