Subaru Legacy 2005 Service Manual page 2224

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
7 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED MODULE AND STOP
LIGHT SWITCH.
Measure the resistance of harness between
body integrated module and stop light switch.
Connector & terminal
(B281) No. 23 — Chassis ground:
8 CHECK POOR CONTACT.
Check
Is the resistance more than 1
MΩ?
Is there poor contact in input
signal of brake switch?
4AT(diag)-52
Yes
Go to step 8. Repair the short
circuit of harness
between body inte-
grated module and
stop light switch.
Repair the poor Check the body
contact. integrated module.
No