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 assembly blinks due to a signal output from the immobiliser system. The security indicator light assembly blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.

The theft warning ECU assembly causes the security indicator light assembly to come on or blink 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 ignition switch to ON.

(c) Turn the Techstream main switch on.

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

Security





OK:

The security indicator light flashes or goes off correctly when operating it through the Techstream.

NG -- CHECK HARNESS AND CONNECTOR (THEFT DETERRENT ECU ASSEMBLY - SECURITY INDICATOR LIGHT)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Theft Deterrent System

2. CHECK HARNESS AND CONNECTOR (THEFT DETERRENT ECU ASSEMBLY - SECURITY INDICATOR LIGHT)

(a) Disconnect the E72 theft warning ECU assembly and E60 Security Indicator light assembly connectors.





(b) 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.

3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT ASSEMBLY - BODY GROUND)

(a) 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. INSPECT SECURITY INDICATOR LIGHT ASSEMBLY (TELLTALE LIGHT ASSEMBLY)

(a) Remove the security indicator light assembly Removal.





(b) Reconnect the E60 security indicator light assembly and E72 theft warning ECU assembly connectors.

(c) Apply battery voltage from the wire harness back side between the specified terminals of the indicator, and check the lighting condition of the security indicator light assembly.

Standard:





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

NG -- REPLACE SECURITY INDICATOR LIGHT ASSEMBLY (TELLTALE LIGHT ASSEMBLY) Removal

OK -- REPLACE THEFT WARNING ECU ASSEMBLY Removal