Subaru Legacy 2004 Service Manual page 3554

AIRBAG SYSTEM (DIAGNOSTICS)
Step
6 CHECK AIRBAG REAR HARNESS (SIDE
AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(3R) in the test harness R and chassis ground.
Connector & terminal
(3R) No. 20 — Chassis ground:
(3R) No. 18 — Chassis ground:
Diagnostic Chart with Trouble Code
Is the resistance more than 1
M"?
AB(diag)-64
Check Yes
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>
No
Replace the airbag
rear harness with
body harness.