Security Indicator Light Does not Blink [11/2021 - ]: 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 [11/2021 - 03/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2023 - ] 

Result: 

OK 

See step  2

1. Perform the Active Test according to the display on the GTS.

   Body Electrical > Smart Access > Active Test 

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

   Body Electrical > Smart Access > Active Test 

   Tester Display
   Immobilizer Indicator

   OK

   The security indicator light (theft warning indicator light assembly) operates normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  3

1. When the immobilizer is set, check that the security indicator light (theft warning indicator light assembly) blinks.*1

   OK

   The security indicator light (theft warning indicator light assembly) blinks normally.

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

   OK

   The security indicator light (theft warning indicator light 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 [11/2021 - ] 

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [11/2021 - ] 

1. Disconnect the D58 certification ECU (smart key ECU assembly) connector.
2. Disconnect the D142 security indicator light (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
   D58-25 (IND) - D142-1 (LP)	Always	Below 1 Ω
   D58-25 (IND) or D142-1 (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. Connect the D58 certification ECU (smart key ECU assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Connect the D142 security indicator light (theft warning indicator light assembly) connector.
3. Using an oscilloscope, check the waveform.

   Measurement Condition

   Tester Connection	Condition	Specified Condition
   D58-25 (IND) - Body ground	Ignition switch off → ON	Pulse generation → Below 2 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SECURITY INDICATOR LIGHT (THEFT WARNING INDICATOR LIGHT ASSEMBLY) 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [11/2021 - ]