Toyota 4Runner: Security Indicator Light Circuit

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/ Smart Key System) / Security Indicator Light Circuit

DESCRIPTION

When the engine immobiliser system is set, the security indicator flashes continuously, but does not illuminate if the engine immobiliser system is not set.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the certification ECU (smart key ECU assembly), refer to Registration (See page ).

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (IMMOBILISER INDICATOR)

(a) Check that the security indicator light illuminates when operating it with the Active Test (See page ).

Smart Key

Tester Display	Test Part	Control Range	Diagnostic Note
Immobiliser Indicator	Security indicator light	ON/OFF	The test is possible when the following conditions are met: The key is in the cabin. The engine switch is on (IG).

OK:

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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 ).

REPLACE SECURITY INDICATOR LIGHT (TELLTALE LIGHT ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - CERTIFICATION ECU AND BODY GROUND)

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

(b) Disconnect the F79 certification ECU (smart key ECU assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F32-6 (LP) - F79-2 (IND)	Always	Below 1 Ω
F32-1 (GND) - Body ground	Always	Below 1 Ω
F32-6 (LP) or F79-2 (IND) - Body ground	Always	10 kΩ or higher

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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