Toyota 4Runner: Security Indicator Light Circuit

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Theft Deterrent System / 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 cabin1 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.

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 - 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 ).

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

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Security Horn Circuit

DESCRIPTION When the theft deterrent system is in the alarm sounding state, the main body ECU outputs a signal repeatedly at 0.4 second intervals, causing the security horn assembly to sound WIR ...

Transponder Key Amplifier

Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT TRANSPONDER KEY AMPLIFIER (a) Apply battery voltage to the connector and check the LED illuminatio ...

Other materials about Toyota 4Runner:

Brake Booster Pump Motor on Time Abnormally Long (C1252)
DESCRIPTION The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU. DTC Code DTC Detection Condition Trouble Area ...

A-TRAC Indicator Light Remains ON
DESCRIPTION This is the A-TRAC main switch circuit. When the A-TRAC switch is turned on with the transfer in L4, the A-TRAC function is available and the A-TRAC indicator light illuminates. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replaci ...