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Subaru Crosstrek Service Manual: Dtc b1698 door sensor lh initialization incomplete

AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

Open or short circuit in harness of side sensor bus (LH)

Front door impact sensor (LH) is faulty.

Curtain airbag sensor (LH) is faulty.

Airbag control module is faulty.

CAUTION:

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

Wiring diagram:

Airbag system Airbag System > WIRING DIAGRAM">

STEPCHECKYESNO

1.CHECK DTC.

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

Is DTC B1627 or B1628 displayed?

Perform the diagnosis according to DTC.

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 2.

2.CHECK DTC.

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

Is DTC B1637 or B1638 displayed?

Perform the diagnosis according to DTC.

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 3.

3.CHECK POOR CONTACT OF CONNECTORS.

Check for poor contact of the connectors between the airbag control module and the front door impact sensor (LH).

Is there poor contact?

Replace the airbag rear harness and the door harness.

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 4.

4.CHECK AIRBAG REAR HARNESS AND DOOR HARNESS (BETWEEN CURTAIN AIRBAG SENSOR LH AND FRONT DOOR IMPACT SENSOR LH).

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

2) Disconnect the connector (AB21) from seat belt pretensioner (LH).

3) Disconnect the connector (AB31) from curtain airbag module (LH).

4) Disconnect connector (AB19) from side airbag module (LH).

5) Disconnect the connector (AB32) from curtain airbag sensor (LH), and connect the connector (2V) in test harness V to connector (AB32).

6) Disconnect the connector (AB58) from the front door impact sensor (LH), and connect the connector (1H) in the test harness H to connector (AB58).

7) Measure the resistance between connector (3V) in the test harness V and connector (3H) in the test harness H.

Connector & terminal

(3V) No. 4 — (3H) No. 5:

(3V) No. 5 — (3H) No. 6:

Is the resistance less than 10 ??

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 5.

Check the door harness, and if any fault is found, replace the harness. If there is no fault, replace the airbag rear harness together with body harness.

5.CHECK AIRBAG REAR HARNESS AND DOOR HARNESS (BETWEEN CURTAIN AIRBAG SENSOR LH AND FRONT DOOR IMPACT SENSOR LH).

Measure the resistance between connector (3V) in test harness V and chassis ground, and the resistance between connector (3V) terminals in test harness V.

Connector & terminal

(3V) No. 4 — Chassis ground:

(3V) No. 5 — Chassis ground:

(3V) No. 4 — (3V) No. 5:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 6.

Check the door harness, and if any fault is found, replace the harness. If there is no fault, replace the airbag rear harness together with body harness.

6.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 B1698 displayed?

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 7.

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 9.

7.REPLACE FRONT DOOR IMPACT SENSOR (LH) AND CHECK AIRBAG CONTROL MODULE AFTER REPLACEMENT.

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

2) Replace the front door impact sensor (LH). Front Door Impact Sensor > REMOVAL">

3) Connect all connectors.

4) Clear the memory. Clear Memory Mode">

5) Perform the Inspection Mode. Inspection Mode">

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

Is DTC B1698 displayed?

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 8.

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 9.

8.REPLACE CURTAIN AIRBAG SENSOR (LH) AND CHECK AIRBAG CONTROL MODULE AFTER REPLACEMENT.

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

2) Replace the curtain airbag sensor (LH). Curtain Airbag Sensor > REMOVAL">

3) Connect all connectors.

4) Clear the memory. Clear Memory Mode">

5) Perform the Inspection Mode. Inspection Mode">

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

Is DTC B1698 displayed?

Replace the airbag control module. Airbag Control Module > REMOVAL">

Diagnostic Chart with Trouble Code > DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE">Go to Step 9.

9.CHECK FOR ANY OTHER DTC ON DISPLAY.

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

Is any other DTC displayed?

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

Finish the diagnosis.

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