DTC 21 Airbag ECM Failure: DTC Detecting Condition
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Airbag control module is faulty.
CAUTION:
- Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the ground cable from battery, and wait 60 seconds or more before starting to work.
- When replacing the airbag module, seat belt pretensioner, roll connector, control module and sensor, reconnect each part and check that the warning light operates properly.
DIAGNOSTIC PROCEDURE CHART
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK IF DTC 21 IS INDICATED. Read the DTC. < Ref. to OPERATION , Read Diagnostic Trouble Code (DTC). > |
Does the Subaru Select Monitor display DTC 21? | Replace the airbag control module. < Ref. to AIRBAG CONTROL MODULE . > | Perform the Clear Memory Mode. < Ref. to OPERATION , Clear Memory Mode. > |