ENGINE IMMOBILISER SYSTEM (w/ Entry and Start System) Security Indicator Light Circuit

DESCRIPTION

• When the engine immobiliser system is set, the security indicator flashes continuously, but does not illuminate if the engine immobiliser system is not set.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY INDICATOR)

   
   

   1. Check that the security indicator light illuminates when operating it with the Active Test Click here.

      Entry&Start

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

      OK
      Security indicator illuminates.

   
   

   NG

   INSPECT TELLTALE LIGHT ASSEMBLY Click here

   OK

   REPLACE CERTIFICATION ECU

2. INSPECT TELLTALE LIGHT ASSEMBLY

   
   
   1. 

      Text in Illustration

      *1	w/o TOYOTA Parking Assist-sensor System
      *2	w/ TOYOTA Parking Assist-sensor System

      Remove the telltale light assembly Click here.

   2. w/o TOYOTA Parking Assist-sensor System:

      
      

      1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the security indicator illuminates.

         OK
         Security indicator illuminates.

   3. w/ TOYOTA Parking Assist-sensor System:

      
      

      1. Connect the positive (+) lead from the battery to terminal 12 and the negative (-) lead to terminal 13, and check that the security indicator illuminates.

         OK
         Security indicator illuminates.

   
   

   NG

   REPLACE TELLTALE LIGHT ASSEMBLY Click here

   OK

3. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - CERTIFICATION ECU AND BODY GROUND)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Telltale Light Assembly [w/o TOYOTA Parking Assist-sensor System])
      *2	Front view of wire harness connector (to Telltale Light Assembly [w/ TOYOTA Parking Assist-sensor System])
      *3	Front view of wire harness connector (to Certification ECU)

      Disconnect the H67*1 or H113*2 light connector.

      
      

      • *1: w/o TOYOTA Parking Assist-sensor System

      • *2: w/ TOYOTA Parking Assist-sensor System

   2. Disconnect the H51 ECU connector.

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

      Standard Resistance
      w/o TOYOTA Parking Assist-sensor System
      Tester Connection Condition Specified Condition H67-1 (LP) - H51-2 (IND) Always Below 1 Ω H67-2 (E) - Body ground Always Below 1 Ω H67-1 (LP) or H51-2 (IND) - Body ground Always 10 kΩ or higher
      w/ TOYOTA Parking Assist-sensor System
      Tester Connection Condition Specified Condition H113-12 (LP) - H51-2 (IND) Always Below 1 Ω H113-13 (E) - Body ground Always Below 1 Ω H113-12 (LP) or H51-2 (IND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE CERTIFICATION ECU