Toyota 4Runner manuals

Toyota 4Runner: Security Indicator Light Circuit

DESCRIPTION

  • When the theft deterrent system is in the disarmed state, the security indicator light flashes continuously when the engine immobiliser system is set, and does not illuminate when the engine immobiliser system is not set.

    When the theft deterrent system is in the armed state, the engine immobiliser system is automatically set and the security indicator light flashes continuously.

    When the theft deterrent system is in the arming preparation state or alarm sounding state, the main body ECU (multiplex network body ECU) causes the security indicator light to be illuminated.

WIRING DIAGRAM


PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

(a) Operate the Techstream according to the steps on the display and select Active Test (See page ).


Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Security Indicator

Security indicator light

ON/OFF

The test is possible when the following conditions are met:

  • The key is in the cabin*1
  • The engine switch on (IG)*1
  • The key is in the ignition key cylinder*2
  • *1: w/ Smart Key System
  • *2: w/o Smart Key System

OK:

Security indicator light can be turned on and off using the Techstream.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

INSPECT SECURITY INDICATOR LIGHT (TELLTALE LIGHT ASSEMBLY)

(a) Remove the security indicator light (telltale light assembly) (See page ).


(b) Inspect the security indicator light (telltale light assembly) (See page ).



NG

REPLACE SECURITY INDICATOR LIGHT (TELLTALE LIGHT ASSEMBLY)


OK

3.

CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the F32 security indicator light (telltale light assembly) connector.

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly (See page ).


(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F32-6 (LP) - A-23 (IND)

Always

Below 1 Ω

F32-1 (GND) - Body ground

Always

Below 1 Ω

F32-6 (LP) or A-23 (IND) - Body ground

Always

10 kΩ or higher


OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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