Subaru 2002 IMPREZA Service Manual page 1611

9. Clear Memory Mode
A: OPERATION
1. WITHOUT SUBARU SELECT MONITOR
Current diagnostic trouble codes (DTC) shown on
display are cleared by turning the ignition switch to
OFF after conducting on-board diagnostics opera-
tion. Previous diagnostic trouble codes (DTC),
however, cannot be cleared since they are stored
in the TCM memory which is operating on back-up
power supply. These diagnostic trouble codes
(DTC) can be cleared by removing the specified
fuse (located under light or left lower position of the
instrument panel).
CLEAR MEMORY:
Removal of No. 4 fuse (for at least one
minute)
• The No. 4 fuse is located in the line to memory
back-up power supply of TCM. Removal of this
fuse clears the previous diagnostic trouble codes
(DTC) stored in TCM memory.
• Be sure to remove the No. 4 fuse for at least the
specified length of time. Otherwise, the diagnostic
trouble codes (DTC) may not be cleared.
2. WITH SUBARU SELECT MONITOR
Refer to SUBARU SELECT MONITOR for informa-
tion about how to clear trouble codes.
<Ref. to AT-21, CLEAR MEMORY MODE, OPER-
ATION, Subaru Select Monitor.>
CLEAR MEMORY MODE
AT-25
AUTOMATIC TRANSMISSION (DIAGNOSTICS)