Subaru 2002 IMPREZA Service Manual page 435

BASIC DIAGNOSTIC PROCEDURE
ENGINE (DIAGNOSTICS)
2. AUTOMATIC TRANSMISSION
When the diagnostic trouble code (DTC) about au-
tomatic transmission is shown on display, carry out
the following basic check. After that, carry out the
replacement or repair work.
1) ATF level check <Ref. to AT-9, Automatic Trans-
mission Fluid.>
2) Differential gear oil level check <Ref. to AT-11,
Differential Gear Oil.>
3) ATF leak check <Ref. to AT-9, Automatic Trans-
mission Fluid.>
4) Differential gear oil leak check <Ref. to AT-11,
Differential Gear Oil.>
5) Stall test <Ref. to AT-13, Stall Test.>
6) Line pressure test <Ref. to AT-16, Line Pressure
Test.>
7) Transfer clutch pressure test <Ref. to AT-18,
Transfer Clutch Pressure Test.>
8) Time lag test <Ref. to AT-15, Time Lag Test.>
9) Road test <Ref. to AT-12, Road Test.>
10) Shift characteristics <Ref. to AT-18, Transfer
Clutch Pressure Test.>
EN-3