Engine Immobiliser System (For Hatchback) Security Indicator Light Does Not Blink

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

READ VALUE USING TECHSTREAM (ENGINE IMMOBILISER SYSTEM STATUS)

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - THEFT WARNING INDICATOR LIGHT ASSEMBLY AND BODY GROUND)

INSPECT THEFT WARNING INDICATOR LIGHT ASSEMBLY

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - BATTERY AND BODY GROUND)

DESCRIPTION

1. When the engine immobiliser system is set, the theft warning indicator light assembly blinks continuously, but does not illuminate if the engine immobiliser system is not set.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   
2. When replacing the transponder key ECU assembly, refer to Registration (YARIS_NCP93 RM00000120Y021X.html).
   

1. Check for DTCs (YARIS_NCP93 RM000001TCQ01OX.html).
   

   OK:

   DTC is not output.
   

1. Check that the theft warning indicator light assembly illuminates when operating it with the Active Test (YARIS_NCP93 RM000001TCS01KX.html).
   
   

   Immobiliser

   Tester Display	Test Part	Control Range	Diagnostic Note
   Security Indicator	Theft Warning Indicator Light Assembly	OFF / ON	-

   OK:

   Theft warning indicator light assembly can be turned on and off using the Techstream.
   

1. Turn the ignition switch off.
   

   HINT:

   When using the Techstream with the ignition switch off to troubleshoot: Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds until communication between the Techstream and vehicle begins.

2. Using the Techstream, read the Data List (YARIS_NCP93 RM000001TCS01KX.html).
   
   

   Immobiliser

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Immobiliser	Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset	Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder)) Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder))	When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.

1. Disconnect the D139 transponder key ECU assembly connector.
   

2. Disconnect the D141 theft warning indicator light assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D139-8 (IND) - D141-2	Always	Below 1 Ω
   D141-6 - Body ground	Always	Below 1 Ω
   D139-8 (IND) - Body ground	Always	10 kΩ or higher

1. Inspect the theft warning indicator light assembly (YARIS_NCP93 RM000002QCV006X.html).
   

1. Disconnect the D139 transponder key ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D139-16 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   D139-1 (+B) - Body ground	Always	11 to 14 V
   D139 (IG) - Body ground	Ignition switch off	Below 1 V
   	Ignition switch ON	11 to 14 V