Subaru 2002 IMPREZA Service Manual page 1682

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
7 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Return the engine to idling speed and move
select lever to "N" range.
2)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground ( − − − − ):
8 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1)Connect the connectors to TCM and trans-
mission.
2)Lift-up the vehicle and place safety stand.
NOTE:
On AWD models, raise all wheels off ground.
3)Connect the Subaru Select Monitor to data
link connector.
4)Start the engine and turn Subaru Select
Monitor switch to ON.
5)Start the engine and warm-up the transmis-
sion until ATF temperature is above 80°C
(176°F).
NOTE:
If ambient temperature is below 0°C (32°F),
drive the vehicle until ATF reaches its operating
temperature.
6)Read the data of lock-up duty solenoid using
Subaru Select Monitor.
•Lock-up duty solenoid is indicated in "%".
7)Move the selector lever to "D" range and
slowly increase vehicle speed to 75 km/h (47
MPH). Wheels will lock-up.
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.>
9 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
Return the engine to idling speed and move
selector lever to "N" range.
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.>
Check
Is the voltage less than 0.5 V? Even if the
Is the value 95 %?
Is the value 5 %?
AT-96
Yes
Go to step 10.
POWER indicator
lights up, the cir-
cuit has returned
to a normal condi-
tion at this time. A
temporary poor
contact of the con-
nector or harness
may be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.
Go to step 9. Go to step 10.
Even if the Go to step 10.
POWER indicator
lights up, the cir-
cuit has returned
to a normal condi-
tion at this time. A
temporary poor
contact of the con-
nector or harness
may be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.
No