Subaru IMPREZA GD 2007 Series Manual page 3601

asieps_tobira_IM_US.book 58 ページ ２０１２年１月１７日 火曜日 午後３時４８分
AIRBAG SYSTEM (DIAGNOSTICS)
E: DTC 21 AIRBAG ECM FAILURE
DTC DETECTING CONDITION:
Airbag control module is faulty.
CAUTION:
• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground terminal from battery, and wait for 20 seconds or more before starting to work.
• When replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-
sor, reconnect each part and check that the warning light operates properly.
Step
1 CHECK IF DTC 21 IS INDICATED.
1) Read the DTC. <Ref. to AB(diag)-28, READ
DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.>
2) Perform the Clear Memory Mode. <Ref. to
AB(diag)-36, Clear Memory Mode.>
3) Read the DTC again.
Diagnostic Chart with Trouble Code
Does the Subaru Select Moni-
tor display DTC21?
AB(diag)-58
Check Yes
Replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
No
Temporary poor
contact occurs.