Subaru Crosstrek Service Manual: Dtc b1902 short in front p/t rh (to ground)

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

• Seat belt pretensioner (RH) circuit is shorted to ground.

• 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 B1902 SHORT IN FRONT P/T RH (TO GROUND)">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 six seconds and go off?

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

Diagnostic Chart with Trouble Code > DTC B1902 SHORT IN FRONT P/T RH (TO GROUND)">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 the connector (2N) of 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) in the test harness AG and chassis ground.

Connector & terminal

(3AG) No. 18 — Chassis ground:

(3AG) No. 20 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1902 SHORT IN FRONT P/T RH (TO GROUND)">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 B1902 displayed?

Replace the airbag control module. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B1902 SHORT IN FRONT P/T RH (TO GROUND)">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 b1901 open in front p/t rh

Dtc b1903 short in front p/t rh (to +b)

Other materials:

Dtc b27a2 passenger side external antenna open
KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC B27A2 PASSENGER SIDE EXTERNAL ANTENNA OPENDTC detecting condition:When open circuit occurs in the harness between keyless access CM and passenger’s side front door outer h ...

Inspection
TELEMATICS SYSTEM (DIAGNOSTICS) > Diagnostics with PhenomenonINSPECTION1. THE SYSTEM DOES NOT NOTIFY THE TELEMATICS SERVICE PROVIDER CENTER AUTOMATICALLY AFTER COLLISIONNOTE:Perform the diagnostics for "Phone conversation is not possible. (The microphone does not respond to a voice. No sound ...

New vehicle break-in driving - the first 1,000 miles (1,600 km)
The performance and long life of your vehicle are dependent on how you handle and care for your vehicle while it is new. Follow these instructions during the first 1,000 miles (1,600 km): Do not race the engine. And do not allow engine speed to exceed 4,000 rpm except in an emergency ...