DTC B279A: Theft Deterrent System Communication Line High Fixation [11/2016 - ]: Procedure

1. Clear the DTCs.

   Powertrain > Hybrid Control > Clear DTCs 

Result: 

NEXT 

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

   Powertrain > Hybrid Control > 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:  2

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - ] 

Result:  1

A 

See step  3

1. Turn the power switch off.
2. Check that the connectors are properly connected to the hybrid vehicle control ECU assembly and certification ECU (smart key ECU assembly).

   OK

   Connectors are properly connected.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

CONNECT CONNECTORS PROPERLY 

Result:  1

OK 

See step  4

1. Disconnect the F9 certification ECU (smart key ECU assembly) connector.
2. Disconnect the F137 hybrid vehicle control ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F9-6 (EFIO) - F137-22 (IMI)	Always	Below 1 Ω
   F9-6 (EFIO) or F137-22 (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
   F137-22 (IMI) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  5

1. Replace the certification ECU (smart key ECU assembly) with a new one.

   Refer to REMOVAL [11/2016 - ]

Result: 

NEXT 

1. Register the recognition codes in the ECUs.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2016 - ]

Result: 

NEXT 

1. Register the ECU communication ID.

   HINT: 

   Refer to Registration.

   Refer to REGISTRATION [11/2016 - ]

Result: 

NEXT 

1. Clear the DTCs.

   Powertrain > Hybrid Control > Clear DTCs 

Result: 

NEXT 

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

   Powertrain > Hybrid Control > Trouble Codes 

   OK

   DTC B279A is not output.

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE) 

Result:  3

NG 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [11/2016 - ]