DTC B279A: Anomaly on the IMI High Port (Loss of Communication with IMMO) [11/2021 - ]: Procedure

1. Clear the DTCs.

   for 2UR-GSE:

   Powertrain > Engine > Clear DTCs 

   except 2UR-GSE:

   Powertrain > Engine > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Turn the engine switch on (IG) and wait 10 seconds.
2. Check for DTCs.

   for 2UR-GSE:

   Powertrain > Engine > Trouble Codes 

   except 2UR-GSE:

   Powertrain > Engine > Trouble Codes 

   HINT: 

   If DTCs other than DTC B279A*1 or B279A-12*2 are output, troubleshoot those DTCs first.

   1. *1: for 2UR-GSE
   2. *2: except 2UR-GSE

   Result

   Result	Proceed to
   DTC B279A*1 or B279A-12*2 is output	A
   DTC B279A*1 or B279A-12*2, and other DTCs are output	B

   1. *1: for 2UR-GSE
   2. *2: except 2UR-GSE

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 09/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ] 

Result: 

A 

See step  3

1. Turn the engine switch off.
2. Check that the connectors are properly connected to the ECM and ID code box (immobilizer code ECU).

   OK

   Connectors are properly connected.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT CONNECTORS PROPERLY 

Result: 

OK 

See step  4

1. Disconnect the K83 ID code box (immobilizer code ECU) connector.
2. Disconnect the A116*1, A106*2 or A91*3 ECM connector.
   1. *1: for 2UR-GSE
   2. *2: for 2GR-FKS
   3. *3: for 8AR-FTS
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 2UR-GSE
   
   

   Tester Connection	Condition	Specified Condition
   K83-4 (EFIO) - A116-8 (IMI)	Always	Below 1 Ω
   K83-4 (EFIO) or A116-8 (IMI) - Body ground	Always	10 kΩ or higher

   FOR 2GR-FKS
   
   

   Tester Connection	Condition	Specified Condition
   K83-4 (EFIO) - A106-59 (IMI)	Always	Below 1 Ω
   K83-4 (EFIO) or A106-59 (IMI) - Body ground	Always	10 kΩ or higher

   FOR 8AR-FTS
   
   

   Tester Connection	Condition	Specified Condition
   K83-4 (EFIO) - A91-28 (IMI)	Always	Below 1 Ω
   K83-4 (EFIO) or A91-28 (IMI) - Body ground	Always	10 kΩ or higher

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

   Standard Voltage

   FOR 2UR-GSE
   
   

   Tester Connection	Condition	Specified Condition
   A116-8 (IMI) - Body ground	Always	11 to 14 V

   FOR 2GR-FKS
   
   

   Tester Connection	Condition	Specified Condition
   A106-59 (IMI) - Body ground	Always	11 to 14 V

   FOR 8AR-FTS
   
   

   Tester Connection	Condition	Specified Condition
   A91-28 (IMI) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the ID code box (immobilizer code ECU) with a new one.

   Refer to REMOVAL [04/2013 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Register the recognition codes in the ECUs.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2021 - 09/2022] , or refer to REGISTRATION [09/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Register the ECU communication ID.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2021 - 09/2022] , or refer to REGISTRATION [09/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Clear the DTCs.

   for 2UR-GSE:

   Powertrain > Engine > Clear DTCs 

   except 2UR-GSE:

   Powertrain > Engine > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

1. Perform "DTC Output Confirmation Operation" procedure.
2. Check for DTCs.

   for 2UR-GSE:

   Powertrain > Engine > Trouble Codes 

   except 2UR-GSE:

   Powertrain > Engine > Trouble Codes 

   OK

   DTC B279A*1 or B279A-12*2 is not output.

   1. *1: for 2UR-GSE
   2. *2: except 2UR-GSE

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (ID CODE BOX (IMMOBILIZER CODE ECU) WAS DEFECTIVE) 

Result: 

NG 

REPLACE ECM 

for 2UR-GSE: Refer to REMOVAL [11/2021 - ]

for 2GR-FKS: Refer to REMOVAL [10/2017 - ]

for 8AR-FTS: Refer to REMOVAL [08/2015 - ]