Security Indicator Light Circuit

THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: Security Indicator Light Circuit
- Security Indicator Light Circuit

DESCRIPTION

Even when the theft deterrent system is in the disarmed state, the security indicator light blinks due to a signal output from the immobiliser system. The security indicator light blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.

The main body ECU (multiplex network body ECU) causes the security indicator light to come on only during the arming preparation and alarm sounding states.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Select the item below in the Active Test and then check that the indicator operates.

Main Body





OK:

The security indicator light flashes and goes off correctly when operated through the Techstream.

NG -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Theft Deterrent System

2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the 2D instrument panel junction block assembly and A main body ECU (multiplex network body ECU) connectors.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (SECURITY INDICATOR) - MAIN BODY ECU)

(a) Reconnect the 2D instrument panel junction block assembly connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (SECURITY INDICATOR) - BODY GROUND)

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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE RADIO RECEIVER ASSEMBLY (SECURITY INDICATOR LIGHT) Removal