DTC B279A: Theft Deterrent System Communication Line High Fixation [10/2014 - ]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

Result: 

NEXT 

See step  2

1. Turn the engine switch on (IG) and wait 10 seconds.
2. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   Result

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

   HINT: 

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

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] )

Result: 

A 

See step  3

1. Turn the engine switch off.
2. Check that the connectors are properly connected to the ECM and certification ECU (smart key ECU assembly).

   OK

   Connectors are properly connected.

Result: 

NG 

CONNECT CONNECTORS PROPERLY 

Result: 

OK 

See step  4

1. Disconnect the A28 certification ECU (smart key ECU assembly) connector.
2. Disconnect the A18 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A28-13 (EFIO) - A18-31 (IMI)	Always	Below 1 Ω
   A28-13 (EFIO) or A18-31 (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
   A18-31 (IMI) - Body ground	Always	Below 1 V

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one (Refer to REMOVAL [10/2014 - 10/2015] Refer to REMOVAL [10/2015 - ] ).

Result: 

NEXT 

See step  6

1. Register the recognition codes in the ECUs (Refer to REGISTRATION [10/2014 - ] ).

Result: 

NEXT 

See step  7

1. Register the ECU communication ID (Refer to REGISTRATION [10/2014 - ] ).

Result: 

NEXT 

See step  8

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

Result: 

NEXT 

See step  9

1. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   HINT: 

   Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

   OK

   DTC B279A is not output.

Result: 

OK 

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

Result: 

NG 

REPLACE ECM 

(Refer to REMOVAL [10/2014 - ] )