Engine Immobiliser System Security Indicator Light Does Not Blink

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY INDICATOR LIGHT)

READ VALUE USING INTELLIGENT TESTER (ENGINE IMMOBILISER SYSTEM STATUS)

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

REPLACE SECURITY INDICATOR LIGHT ASSEMBLY

CHECK SECURITY INDICATOR LIGHT ASSEMBLY

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

DESCRIPTION

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

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

1. Check for DTCs (HILUX_TGN26 RM000000Z3I00TX.html).
   

   OK:

   DTC is not output.
   

1. Check that the security indicator light assembly illuminates when operating it with the Active Test (HILUX_TGN26 RM000000Z3K00SX.html).
   
   

   Immobiliser

   Tester Display	Test Part	Control Range	Diagnostic Note
   Security Indicator	Security indicator light	ON or OFF	The test is possible when the following condition is met: The key is in the ignition key cylinder.

   OK:

   Security indicator light assembly can be turned on and off using the intelligent tester.
   

1. Turn the ignition switch off.
   

   HINT:

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

2. Using the intelligent tester, read the Data List (HILUX_TGN26 RM000000Z3K00SX.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.

   OK:

   Set (the key is not inserted in the ignition key cylinder) and Unset (the key is inserted in the ignition key cylinder) appear on the screen according to the key insertion condition.
   

1. Disconnect the G27 security indicator light assembly connector.
   

2. Disconnect the G26 transponder key ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   G27-2 (LP) - G26-8 (IND)	Always	Below 1 Ω
   G27-1 (E) - Body ground	Always	Below 1 Ω
   G27-2 (LP) or G26-8 (IND) - Body ground	Always	10 kΩ or higher

1. Temporarily replace the security indicator light assembly with a new or normally functioning one (HILUX_TGN26 RM00000478I00QX.html).
   

1. When the immobiliser is set (the ignition switch is off), check that the security indicator light assembly blinks.
   

   OK:

   Security indicator light assembly blinks.
   

1. Disconnect the G26 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
   G26-16 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   G26-1 (+B) - Body ground	Always	11 to 14 V
   G26-2 (IG) - Body ground	Ignition switch off	Below 1 V
   	Ignition switch ON	11 to 14 V