THEFT DETERRENT SYSTEM (w/o Smart Entry and Start System) 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 light blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.

The main body ECU causes the security indicator light to come on or blink only during the arming preparation state and alarm sounding state.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   PERFORM ACTIVE TEST USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to the ON position.

   3. Turn the intelligent tester main switch on.

   4. Select the item below in the Active Test and then check that the indicator operates.

      Table 1. Main Body:

      Tester Display	Test Part	Control Range	Diagnostic Note
      Security Indicator	Security indicator light	ON / OFF	-

      OK
      The security indicator light blinks or goes off correctly when operating it through the intelligent tester.

   
   
   • OKClick here
   • NGClick here
2. Click here

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

   
   
   1. 

      Disconnect the D9 ECU connector.

   2. Disconnect the E13 connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition D9-4 (IND) - E13-2 (IND+) Always Below 1 Ω D9-4 (IND) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
3. Click here

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

   
   
   1. 

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

      Standard resistance
      Tester Connection Condition Specified Condition E13-5 (E) - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT SECURITY INDICATOR LIGHT

   
   
   1. 

      Reconnect the E13 connector with the D9 ECU connector still disconnected.

   2. 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.

      Standard
      Measurement Condition Specified Condition Battery positive (+) → Terminal E13-2 (IND+) Battery negative (-) → Terminal E13-5 (E) Security indicator light comes on

      Note:
      

      • If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator light will not come on.

      • Voltage of more than 12 V will damage the security indicator light.

      • If the voltage is too low, the security indicator light will not come on.

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

6. Click here

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   REPLACE SECURITY INDICATOR LIGHTClick here