Security Indicator Light Circuit

THEFT DETERRENT: 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 blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.

The main body ECU RH (cowl side junction block RH) causes the security indicator to light up or blink only during the arming preparation state and alarm sounding state.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

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

Body





OK:

The security indicator light turns on and off correctly when operated through the Techstream.

NG -- INSPECT SECURITY INDICATOR

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

2. INSPECT SECURITY INDICATOR

(a) w/ Multi-display:





(1) Remove the multi-display assembly Removal.

(2) Apply battery voltage to the terminals of the multi-display and check the lighting condition of the security indicator.

Standard:





Text in Illustration





NOTICE:
* If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not light up.
* Voltage of more than 12 V will damage the security indicator.
* If the voltage is too low, the security indicator will not light up.

(b) w/o Multi-display:





(1) Remove the integration control and panel assembly Removal.

(2) Apply battery voltage to the terminals of the center cluster integration switch and check the lighting condition of the security indicator.

Standard:





Text in Illustration





NOTICE:
* If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not light up.
* Voltage of more than 12 V will damage the security indicator.
* If the voltage is too low, the security indicator will not light up.

Result:





A -- REPLACE MULTI-DISPLAY ASSEMBLY Removal

B -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal
C -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - MULTI-DISPLAY OR INTEGRATION CONTROL)

(a) w/ Multi-display:

(1) Disconnect the J74 main body ECU RH connector and J103 multi-display assembly connector.

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

Standard Resistance:





(b) w/o Multi-display:

(1) Disconnect the J74 main body ECU RH connector and J54 integration control and panel connector.

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

Standard Resistance:





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

4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY OR INTEGRATION CONTROL AND PANEL - BODY GROUND)

(a) w/ Multi-display:

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

Standard Resistance:





(b) w/o Multi-display:

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)