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.
Engine Immobiliser System

Symptom

Suspected Area

See page

Engine does not start

ECU power source circuit


SFI system


Transponder key ECU assembly


Security indicator light malfunction

Security indicator light circuit


Transponder key ECU assembly


Unable to register key

Key

-

Transponder key ECU assembly


Dtc Check / Clear
DTC CHECK / CLEAR HINT: When using the Techstream with the ignition switch off to troubleshoot: Connect the Techstream to the vehicle and turn the front door courtesy light switch LH ...

Push Switch / Key Unlock Warning Switch Malfunction (B2780)
DESCRIPTION This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON. Under normal conditions, the ...

Other materials about Toyota 4Runner:

Fail-safe Chart
FAIL-SAFE CHART If a problem occurs in the power steering system, the power steering warning light in the combination meter comes on and the power steering assist is stopped, locked at a particular point or decreased simultaneously to protect the system. ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very usefu ...

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