Subaru Crosstrek Service Manual: Dtc b1900 short in front p/t rh

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

• Seat belt pretensioner (RH) circuit is shorted.

• Pretensioner (RH) is faulty.

• Pretensioner harness (RH) 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 RH.

Is there poor contact?

Replace the airbag rear harness along with body harness.

Diagnostic Chart with Trouble Code > DTC B1900 SHORT IN FRONT P/T RH">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 (AB26) from seat belt pretensioner (RH).

3) Connect the connector (1N) in the test harness N to the connector (AB26).

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 (RH). Front Seat Belt">

Diagnostic Chart with Trouble Code > DTC B1900 SHORT IN FRONT P/T RH">Go to Step 3.

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

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 test harness N.

3) Disconnect connector (AB24) from side airbag module (RH).

4) Disconnect the connector (AB33) from curtain airbag module (RH).

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. 18 — (3AG) No. 20:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1900 SHORT IN FRONT P/T RH">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 B1900 displayed?

Replace the airbag control module. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B1900 SHORT IN FRONT P/T RH">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 b1863 short in driver s knee airbag (to +b)

Dtc b1901 open in front p/t rh

Other materials:

Installation
ENTERTAINMENT > Front Accessory Power Supply SocketINSTALLATIONCAUTION:• After installing the center grille assembly, check that the air vent grille of the center grille assembly is inserted correctly into the air vent duct.• Before handling the airbag system components, always refer ...

Operation
INSTRUMENTATION/DRIVER INFO > Combination Meter SystemOPERATION1. SELF-DIAGNOSIS DISPLAY MODEThe self-diagnosis (checking of each meter, warning light, indicator light, illumination, LCD/TFT) of combination meter can be performed in the following procedure.1. ProcedureCAUTION:Perform the steps de ...

Fuel injector circuit
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostics for Engine Starting FailureFUEL INJECTOR CIRCUITCAUTION:• Check or repair only faulty parts.• After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode ...