DTC B279A: Theft Deterrent System Communication Line High Fixation [06/2015 - ]: Procedure

1. Clear the DTCs.

   Powertrain > EV > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

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

   Powertrain > EV > Trouble Codes 

   HINT: 

   If DTCs other than DTC B279A are output, troubleshoot those DTCs first.

   Result

   Result	Proceed to
   DTC B279A is output	A
   DTC B279A and other DTCs are output	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2015 - ] 

Result: 

A 

See step  3

1. Turn the power switch off.
2. Check that the connectors are properly connected to the EV control ECU 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 G15 ID code box (immobilizer code ECU) connector.
2. Disconnect the G46 EV control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G15-4 (EFIO) - G46-22 (IMI)	Always	Below 1 Ω
   G15-4 (EFIO) or G46-22 (IMI) - Body ground	Always	10 kΩ or higher

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G46-22 (IMI) - Body ground	Always	Below 1 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 [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Register the recognition codes in the ECUs.

   Refer to REGISTRATION [06/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Register the ECU communication ID.

   Refer to REGISTRATION [06/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Clear the DTCs.

   Powertrain > EV > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

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

   Powertrain > EV > Trouble Codes 

   OK

   DTC B279A is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ]