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DTC B19F7 Short In Front P/T 2 LH (To +B): Wiring Diagram

See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Airbag System - Wiring Diagram (Front P/T 2 LH)
G08584242Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK POOR CONTACT OF CONNECTORS. 
Check for poor contact of the connectors between the airbag control module and the lap seat belt pretensioner (LH).		 Is there poor contact? Replace the airbag rear harness along with body harness. Go to step 2  .
2 CHECK LAP 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 (AB30) from lap seat belt pretensioner (LH).
  3. Connect the connector (1Q) in the test harness Q to connector (AB30).
  4. Connect the airbag resistor to the connector (2Q) in the test harness Q.
  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 lap seat belt pretensioner (LH). Refer to INNER BELT ASSY . Go to step 3  .
3 CHECK AIRBAG REAR HARNESS (LAP SEAT BELT 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 test harness Q.
  3. Disconnect the connector (AB33) from curtain airbag module (LH).
  4. Disconnect the connector (AB24) from side airbag module (LH).
  5. Disconnect the connector (AB26) from seat belt pretensioner.
  6. Disconnect the connectors (AB6, AB17, AB18) from airbag control module.
  7. Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).
    NOTE: For sedan models, connect test harness AH between the connectors (AB6, AB17, AB18) and (1AG).
  8. Connect the battery ground terminal and turn the ignition switch to ON.
  9. Measure the voltage between connector (3AG) in the test harness AG and chassis ground.

    Connector & terminal 

    (3AG) No. 17 (+) - Chassis ground (-): 

    (3AG) No. 19 (+) - Chassis ground (-): 

 Is the voltage less than 1 V? 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.
  3. Perform the Inspection Mode.
  4. Read the DTC.
 Is the same DTC displayed? Replace the airbag control module. Refer to AIRBAG CONTROL MODULE . 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)". Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . Finish the diagnosis.
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