Subaru Legacy 2003 Service Manual page 664

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK DRIVING CONDITION.
1) Start and warm-up the engine until the radi-
ator fan makes one complete rotation.
2) Drive the vehicle.
Is AT shift control functioning properly?
2 CHECK ACCESSORY.
Are car phone and/or CB installed on vehicle?
Value
Operates properly.
Installed.
EN(H4SO)-267
ENGINE (DIAGNOSTICS)
Yes
Go to step 2. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Repair grounding Replace TCM.
line of car phone <Ref. to AT-76,
or CB system. Transmission Con-
trol Module
(TCM).>
No