Security Indicator Light Does not Blink [10/2018 - 07/2022]: Procedure

1. Check for DTCs.

   Body Electrical > Smart Access > Trouble Codes 

   Powertrain > Engine > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 07/2022] 

Result: 

OK 

See step  2

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 Access / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Smart Access > Active Test 

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

   Body Electrical > Smart Access > Active Test 

   Tester Display
   Immobiliser Indicator

   OK

   The security indicator light (air conditioning control 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 (air conditioning control assembly) blinks.*1

   OK

   The security indicator light (air conditioning control assembly) blinks normally.

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

   OK

   The security indicator light (air conditioning control 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 [10/2018 - 07/2022] 

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2018 - 07/2022] 

1. Disconnect the F44 certification ECU (smart key ECU assembly) connector.
2. Disconnect the F28 security indicator light (air conditioning control assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F44-20 (IND) - F28-7 (LP)	Always	Below 1 Ω
   F44-20 (IND) or F28-7 (LP) - Other terminals and body ground	Always	10 kΩ or higher
   F28-1 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Connect the F44 certification ECU (smart key ECU assembly) connector.
2. Connect the F28 security indicator light (air conditioning control 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
   F44-20 (IND) - Body ground	Engine switch off → on (IG)	Pulse generation → Below 2 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) OPERATION. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2018 - 07/2022]