Security Indicator Light Does not Blink [02/2019 - 10/2022]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Immobiliser or Main Body* / Active Test.
   1. *: w/ Theft Deterrent System
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Immobiliser > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Security Indicator	Combination meter assembly (security indicator light)	ON/OFF	-

   Body Electrical > Immobiliser > Active Test 

   Tester Display
   Security Indicator

   Body Electrical > Main Body > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Security Indicator	Combination meter assembly (security indicator light)	ON/OFF	w/ Theft Deterrent System

   Body Electrical > Main Body > Active Test 

   Tester Display
   Security Indicator

   Result

   Result	Proceed to
   Combination meter assembly (security indicator light) operation is normal when performing the "Main Body" and "Immobiliser"* Active Test	A
   w/ Theft Deterrent System:  Combination meter assembly (security indicator light) operation is not normal when performing the "Immobiliser" Active Test Combination meter assembly (security indicator light) operation is normal when performing the "Main Body" Active Test	B
   w/ Theft Deterrent System:  Combination meter assembly (security indicator light) operation is normal when performing the "Immobiliser" Active Test Combination meter assembly (security indicator light) operation is not normal when performing the "Main Body" Active Test	C
   Combination meter assembly (security indicator light) operation is not normal when performing the "Main Body" and "Immobiliser"* Active Test	D

   1. *: w/ Theft Deterrent System

Result: 

B 

See step  3

Result: 

C 

See step  4

Result: 

D 

See step  5

Result: 

A 

See step  2

1. When the immobiliser is set, check that the combination meter assembly (security indicator light) blinks.*1

   OK

   The combination meter assembly (security indicator light) blinks normally.

2. When the theft deterrent system is in the arming preparation state, check that the combination meter assembly (security indicator light) is on.*2

   Refer to SYSTEM DESCRIPTION [02/2019 - 10/2019] , or refer to SYSTEM DESCRIPTION [10/2019 - 08/2020] , or refer to SYSTEM DESCRIPTION [08/2020 - ]

   OK

   The combination meter assembly (security indicator light) is on.

   Result

   Result	Proceed to
   Both *1 and *2 are OK	A
   *1 is NG (*2 is OK)	B
   *2 is NG (*1 is OK)	C
   Both *1 and *2 are NG	D

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

B 

REPLACE TRANSPONDER KEY ECU ASSEMBLY. Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022] 

Result: 

C 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022] 

Result: 

D 

REPLACE COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT). Refer to  REMOVAL [11/2018 - 10/2022] 

1. Disconnect the G19 combination meter assembly (security indicator light) connector.
2. Disconnect the G44 main body ECU (multiplex network body ECU) connector.*
   1. *: w/ Theft Deterrent System
3. Disconnect the G52 transponder key ECU assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G52-8 (IND) - G19-7 (LP)	Always	Below 1 Ω
   G52-8 (IND) or G19-7 (LP) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TRANSPONDER KEY ECU ASSEMBLY. Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the G19 combination meter assembly (security indicator light) connector.
2. Disconnect the G44 main body ECU (multiplex network body ECU) connector.*
   1. *: w/ Theft Deterrent System
3. Disconnect the G52 transponder key ECU assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G44-7 (IND) - G19-7 (LP)	Always	Below 1 Ω
   G44-7 (IND) or G19-7 (LP) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the G19 combination meter assembly (security indicator light) connector.
2. Disconnect the G44 main body ECU (multiplex network body ECU) connector.*
   1. *: w/ Theft Deterrent System
3. Disconnect the G52 transponder key ECU assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G44-7 (IND) - G19-7 (LP)	Always	Below 1 Ω
   G44-7 (IND) or G19-7 (LP) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Combination Meter Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G18-23 (ES) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT). Refer to  REMOVAL [11/2018 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR