DTC B1679: Satellite SAFING Sensor Initialization Incomplete

Diagnosis start condition: 

When the ignition voltage is 10 - 16 V.

DTC detecting condition: 

• Open or short circuit in harness of satellite safing sensor
• Satellite safing sensor is faulty.
• Airbag control module is faulty.

Wiring diagram: 

Airbag system Ref. to WIRING SYSTEM IMPREZA MODEL>AIRBAG SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>AIRBAG SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>AIRBAG SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK POOR CONTACT OF CONNECTORS  .

   Check for poor contact of the connectors (AB18, AB41) between the airbag control module and the satellite safing sensor.

   Is there poor contact?

   Yes  : Replace the airbag rear harness along with body harness.

   No  : Go to  2.

2. CHECK AIRBAG REAR HARNESS (BETWEEN AIRBAG CONTROL MODULE AND SATELLITE SAFING SENSOR)  .
   1. Turn the ignition switch to OFF, and wait for 60 seconds or more after disconnecting the ground terminal from the battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
      NOTE: For the hybrid model, turn the ignition switch to OFF, and wait for 60 seconds or more after disconnecting the ground terminal from the battery.
   2. Disconnect the connectors (AB21, AB26) from seat belt pretensioner.
   3. Disconnect the connector (AB30) from the lap seat belt pretensioner RH.
   4. Disconnect the connectors (AB31, AB33) from curtain airbag module.
   5. Disconnect connectors (AB19) and (AB24) from the side airbag module.
   6. Disconnect the connectors (AB17, AB6, AB18) from airbag control module.
   7. Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).
   8. Disconnect the connector (AB41) from the satellite safing sensor and connect to the test harness H connector (1H).
   9. Measure the resistance between connector in the test harness AG and connector in the test harness H.

      Connector & terminal 

      (5AG) No. 15 - (3H) No. 5:

      (6AG) No. 14 - (3H) No. 6:

   Is the resistance less than 10 Ω?

   Yes  : Go to  3.

   No  : Replace the airbag rear harness along with body harness.

3. CHECK AIRBAG REAR HARNESS (BETWEEN AIRBAG CONTROL MODULE AND SATELLITE SAFING SENSOR)  .

   Measure the resistance between connectors (5AG) and (6AG) in the test harness AG and chassis ground, and the resistance between the connectors (5AG) and (6AG) in the test harness AG.

   Connector & terminal 

   (5AG) No. 15 - Chassis ground:

   (6AG) No. 14 - Chassis ground:

   (5AG) No. 15 - (6AG) No. 14:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  4.

   No  : Replace the airbag rear harness along with body harness.

4. CHECK AIRBAG CONTROL MODULE  .
   1. Connect all connectors.
   2. Using the Subaru Select Monitor, perform the clear memory of [Airbag]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
   3. Execute the inspection mode. Ref. to AIRBAG (DIAGNOSTICS)>INSPECTION MODE .
   4. Read the DTC of [Airbag] using the Subaru Select Monitor. Ref. to AIRBAG (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B1679 displayed? (Current malfunction)

   Yes  : Replace the satellite safing sensor. Ref. to AIRBAG SYSTEM>SATELLITE SAFING SENSOR>REMOVAL . Replace the airbag control module if not operating normally even after replacing the sensor. Ref. to AIRBAG SYSTEM>AIRBAG CONTROL MODULE>REMOVAL

   No  : Go to  5.

5. CHECK FOR ANY OTHER DTC ON DISPLAY  .

   Read the DTC of [Airbag] using the Subaru Select Monitor. Ref. to AIRBAG (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is any other DTC displayed? (Current malfunction)

   Yes  : Perform the diagnosis for other displayed DTCs. Ref. to AIRBAG (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No  : Finish the diagnosis.