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 flashes due to a signal output from the immobiliser system. The security indicator flashes continuously due to a continuous signal received from the immobiliser system while in the armed state.
The multiplex network body ECU causes the security indicator to light up or blink only during the arming preparation state and alarm sounding states.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Connect Techstream (with CAN VIM) to the DLC3.
(b) Turn the ignition switch on (IG).
(c) Press 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 Techstream.

NG -- INSPECT COMBINATION METER ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT COMBINATION METER ASSEMBLY





(a) Remove the E2 combination meter assembly.
(b) Apply 12 V positive voltage between the 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 does not illuminate.
- Voltage of more than 12 V will damage the security indicator.
- If the voltage is too low, the security indicator will not illuminate.

NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.

3. CHECK WIRE HARNESS (POWER SOURCE)





(a) Remove the E2 combination meter assembly.
(b) Check the voltage between wire harness side connector and body ground.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE)
OK -- Continue to next step.

4. CHECK WIRE HARNESS (COMBINATION METER - MULTIPLEX NETWORK BODY ECU - BODY GROUND)





(a) Disconnect the D7 ECU connector.
(b) Disconnect the E2 meter connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INSTRUMENT PANEL J/B ASSEMBLY