Subaru Crosstrek Service Manual: Dtc b1906 open in front p/t lh

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

• Seat belt pretensioner (LH) circuit is open.

• Pretensioner (LH) is faulty.

• Pretensioner harness (LH) 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 between the airbag control module and the seat belt pretensioner LH.

Is there poor contact?

Replace the airbag rear harness along with body harness.

Diagnostic Chart with Trouble Code > DTC B1906 OPEN IN FRONT P/T LH">Go to Step 2.

2.CHECK SEAT BELT PRETENSIONER.

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) Connect the connector (1N) in the test harness N to the connector (AB21).

4) Connect the airbag resistor to the connector (2N) of test harness N.

5) Connect the battery ground terminal and turn the ignition switch to ON.

Does the airbag warning light illuminate for 6 seconds and go off?

Replace the seat belt pretensioner (LH). Front Seat Belt">

Diagnostic Chart with Trouble Code > DTC B1906 OPEN IN FRONT P/T LH">Go to Step 3.

3.CHECK AIRBAG REAR HARNESS (PRETENSIONER HARNESS LH).

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

2) Disconnect the airbag resistor from the connector (2N) of test harness N.

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

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

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

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

7) Measure the resistance between connector (3AG) in the test harness AG and connector (2N) in the test harness N.

Connector & terminal

(3AG) No. 10 — (2N) No. 1:

(3AG) No. 12 — (2N) No. 2:

Is the resistance less than 10 ??

Diagnostic Chart with Trouble Code > DTC B1906 OPEN IN FRONT P/T LH">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 B1906 displayed?

Replace the airbag control module. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B1906 OPEN IN FRONT P/T LH">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 b1905 short in front p/t lh

Dtc b1907 short in front p/t lh (to ground)

Other materials:

Initial screen
When the ignition switch is in the "ACC" or "ON" position, the initial screen will be displayed and the system will begin operating. When using the SUBARU STARLINK function (if equipped), the display screen may be different from the screen above. After a few seconds, the caution scr ...

Specification
MECHANICAL(H4DO) > General DescriptionSPECIFICATIONEngineModel2.0 LCylinder arrangementHorizontally opposed, liquid cooled, 4-cylinder,4-stroke gasoline engineValve system mechanismChain driven, double overhead camshaft, 4-valve/cylinderBore ? Strokemm (in)84.0 ? 90.0 (3.31 ? 3.54)Displacementcm3 ...

Basic diagnostic procedure Procedure
BODY CONTROL SYSTEM (DIAGNOSTICS) > Basic Diagnostic ProcedurePROCEDURECAUTION:• Subaru Select Monitor is required for reading DTC, performing diagnosis and reading current data.• Remove foreign matter (dust, water, oil, etc.) from the body integrated unit connector during removal and ...