Subaru Crosstrek Service Manual: Dtc b1677 satellite safing sensor initialization incomplete

Diagnosis start condition:

Ignition voltage is 10 V to 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.

Before performing diagnosis, refer to “CAUTION” in “General Description”. General Description > CAUTION">

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?

Replace the airbag rear harness along with body harness.

Diagnostic Chart with Trouble Code > DTC B1677 SATELLITE SAFING SENSOR INITIALIZATION INCOMPLETE">Go to Step 2.

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

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.

2) Disconnect the connectors (AB21, AB26) from seat belt pretensioner.

3) Disconnect the connectors (AB31, AB33) from curtain airbag module.

4) Disconnect connectors (AB19) and (AB24) from the side airbag module.

5) Disconnect the connectors (AB17, AB6, AB18) from airbag control module.

6) Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test harness AH and the connector (1AG) in the test harness AG.

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 ??

Diagnostic Chart with Trouble Code > DTC B1677 SATELLITE SAFING SENSOR INITIALIZATION INCOMPLETE">Go to Step 3.

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 connector in the test harness AG and chassis ground, and the resistance between connector terminals 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 M? or more?

Diagnostic Chart with Trouble Code > DTC B1677 SATELLITE SAFING SENSOR INITIALIZATION INCOMPLETE">Go to Step 4.

Replace the airbag rear harness along with body harness.

4.CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory. Clear Memory Mode">

3) Perform the Inspection Mode. Inspection Mode">

4) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">

Is DTC B1677 displayed?

Replace the satellite safing sensor. Satellite Safing Sensor > REMOVAL"> Replace the airbag control module if not operating normally even after replacing the sensor. Airbag Control Module > REMOVAL">

Diagnostic Chart with Trouble Code > DTC B1677 SATELLITE SAFING SENSOR INITIALIZATION INCOMPLETE">Go to Step 5.

5.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">

Finish the diagnosis.

Dtc b1676 lost communication with satellite safing sensor

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