Security Indicator Light Does not Blink [08/2019 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key / Trouble Codes and Powertrain / Engine and ECT / Trouble Codes.
5. Check for DTCs.

   Refer to DTC CHECK / CLEAR [08/2019 - ]

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ] 

Result: 

OK 

See step  2

1. Enter the following menus: Body Electrical / Smart Key / Active Test.
2. Perform the Active Test according to the display on the Techstream.
   SMART KEY
   
   

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Immobiliser Indicator	Security indicator light	OFF/ON	-

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  3

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

   OK

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

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

   OK

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

   Result

   Result	Proceed to
   *1 is NG (*2 is OK)	A
   *2 is NG (*1 is OK)	B

Result: 

A 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [08/2019 - ] 

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2019 - ] 

1. Disconnect the H199 certification ECU (smart key ECU assembly) connector.
2. Disconnect the H139 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H199-19 (IND) - H139-36 (LP)	Always	Below 1 Ω
   H199-19 (IND) or H139-36 (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  5

1. Reconnect the certification ECU (smart key ECU assembly) connector.
2. Reconnect the H139 combination meter assembly connector.
3. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (Certification ECU (Smart Key ECU Assembly))

   -

   -

   Measurement Condition

   Tester Connection	Switch Condition	Specified Condition
   H199-19 (IND) - Body ground	Engine switch off → on (IG)	Pulse generation → Below 2 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY). Refer to  REMOVAL [08/2017 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [08/2019 - ]