Security Indicator Light Circuit

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

DESCRIPTION

When the theft deterrent system is in the disarmed state, the security indicator will flash continuously if the immobiliser system is set, or not illuminate if the immobiliser system is not set.

When the theft deterrent system is in the armed state, the immobiliser system is automatically set and the security indicator will flash continuously.

When the theft deterrent system is in the arming preparation state and alarm sounding state, the main body ECU causes the security indicator to be illuminated.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect a 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.

Main Body





OK:

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

NG -- CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR - MAIN BODY ECU)

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

2. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR - MAIN BODY ECU)

(a) Disconnect the H1 maim body ECU connector.





(b) Disconnect the I22 accessory meter connector.

(c) 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 - BODY GROUND)

(a) Disconnect the I22 accessory meter connector.

(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.

4. INSPECT ACCESSORY METER ASSEMBLY

(a) Reconnect the I22 accessory meter connector with the H1 main body ECU connector still disconnected.





(b) 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.

OK:





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

NG -- REPLACE ACCESSORY METER ASSEMBLY Removal

OK -- REPLACE MAIN BODY ECU