Subaru 2003 LEGACY Service Manual page 64

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all connectors.
2) Connect Subaru Select Monitor to data link
connector.
3) Lift-up or raise the vehicle and place safety
stands.
NOTE:
Raise all wheels off floor.
4) Turn ignition switch to ON and turn Subaru
Select Monitor switch to ON.
5) Start the engine.
6) Read data of vehicle speed using Subaru
Select Monitor.
•Compare speedometer with Subaru Select
Monitor indications.
•Vehicle speed is indicated in "km/h" or "MPH".
7) Slowly increase vehicle speed to 60 km/h
or 37 MPH.
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
indicates no malfunction. When AT control di-
agnosis is finished, perform the ABS memory
clearance procedure of on-board diagnostics
system. <Ref. to ABS-22, Clear Memory
Mode.> or <Ref. to VDC-25, Clear Memory
Mode.>
Does the speedometer indication increase
as the Subaru Select Monitor data
increases?
11 CHECK POOR CONTACT.
Is there poor contact in front vehicle speed
sensor circuit?
Step Value
Subaru Select Monitor display
also increases.
There is poor contact.
AT-62
Yes
Even if "POWER" Go to step 11.
indicator lights up,
the circuit has
returned to a nor-
mal condition at
this time. A tempo-
rary poor connec-
tor or harness may
be the case.
Repair harness or
connector in the
front vehicle speed
sensor circuit.
Repair poor con- Replace TCM.
tact. <Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
No