DTC B1838 Short In Curtain Shield Airbag LH Squib Circuit (To +B): Wiring Diagram

See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Airbag System - Wiring Diagram (Curtain Airbag LH Squib Circuit)

G07914584

Courtesy 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, curtain airbag module LH and the curtain airbag sensor LH.	Is there poor contact?	Replace the airbag rear harness along with body harness.	Go to step 2 .
2 CHECK CURTAIN AIRBAG MODULE. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Disconnect the connector (AB31), and connect the connector (1N) in test harness N to connector (AB31). Connect the airbag resistor to the connector (2N) of test harness N. 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 curtain airbag module (LH). Refer to CURTAIN AIRBAG MODULE .	Go to step 3 .
3 CHECK AIRBAG REAR HARNESS (CURTAIN AIRBAG MODULE HARNESS LH). Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Disconnect the connector (AB21) from seat belt pretensioner (LH). Disconnect connector (AB19) from side airbag module (LH). Disconnect the airbag resistor from test harness N. Disconnect the connectors (AB6, AB17, AB18) from airbag control module. 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). Connect the battery ground terminal and turn the ignition switch to ON. Measure the voltage between connector (2N) in the test harness N and chassis ground. Connector & terminal (2N) No. 1 (+) - Chassis ground (-): (2N) No. 2 (+) - 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. Connect all connectors. Clear the memory. Perform the Inspection Mode. Read the DTC. (Current malfunction)	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.