Security Indicator Light Circuit

THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM (w/o Smart Key System): Security Indicator Light Circuit

Security Indicator Light Circuit

DESCRIPTION

Even when the theft deterrent system is in the disarmed state, the security indicator blinks due to a signal output from the Immobilizer system. The security indicator blinks continuously due to a continuous signal received from the Immobilizer system while in the armed state.
The main body ECU (driver side junction block assembly) causes the security indicator 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 ignition switch to ON.
(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 -- CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - MAIN BODY ECU)
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - MAIN BODY ECU)




(a) Disconnect the D51 main body ECU (driver side junction block assembly) connector.
(b) Disconnect the F2 accessory meter assembly connector.
(c) 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.

3. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - 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 -- Continue to next step.

4. INSPECT ACCESSORY METER ASSEMBLY (SECURITY INDICATOR LIGHT)




(a) Reconnect the F2 accessory meter assembly connector with the D51 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 :





Text in Illustration





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
OK -- REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)