Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Dtc b1905 short in front p/t lh

AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC B1905 SHORT 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 shorted.

Pretensioner (LH) is faulty.

Pretensioner harness (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 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 B1905 SHORT 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 B1905 SHORT 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) terminals in test harness AG.

Connector & terminal

(3AG) No. 10 — (3AG) No. 12:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1905 SHORT 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 B1905 displayed?

Replace the airbag control module. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B1905 SHORT 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 b1908 short in front p/t lh (to +b)
AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble CodeDTC B1908 SHORT IN FRONT P/T LH (TO +B)Diagnosis start condition:Ignition voltage is 10 V to 16 V.DTC detecting condition:• Sea ...

Dtc b1906 open in front p/t lh
AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble CodeDTC B1906 OPEN IN FRONT P/T LHDiagnosis start condition:Ignition voltage is 10 V to 16 V.DTC detecting condition:• Seat belt pr ...

Other materials:

Removal
AIRBAG SYSTEM > Airbag Control ModuleREMOVALCAUTION:• Before handling the airbag system components, refer to “CAUTION” of “General Description” in “AIRBAG SYSTEM”. General Description > CAUTION">• Do not disassemble the airbag control mo ...

Diagnostics with phenomenon Inspection
AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS) > Diagnostics with PhenomenonINSPECTION1. BEAM LEVEL CONTROL DOES NOT FUNCTIONCAUTION:• Before performing diagnosis, check the fuse in this circuit.• Initialization is required after replacing the auto headlight beam leveler CM.Wiring d ...

Diagnostic procedure with phenomenon
EyeSight (DIAGNOSTICS) > Diagnostics with PhenomenonDIAGNOSTIC PROCEDURE WITH PHENOMENON1. TEMPORARY STOP OF EyeSightPhenomenonCheck ItemReference1Temporary stop occurs frequently.EyeSight temporary stop indicator illuminates frequently.(1) Check EyeSight temporary stop code. EyeSight Temporary C ...

© 2016-2024 Copyright www.sucross.com