Subaru IMPREZA 2002 Service Manual page 188

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
,
CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Connect the connectors to TCM and trans-
mission.
2)Lift-up the vehicle and place safety stand.
CAUTION:
On AWD models, raise all wheels off
ground.
3)Start the engine and warm-up the transmis-
sion until the ATF temperature is above 80°C
(176°F).
NOTE:
If the ambient temperature is below 0°C (32°F)
drive the vehicle until the ATF reaches its oper.
ating temperature.
4)Move the select lever to "D" and slowly
increase the vehicle speed to 75 km/h (47
MPH). Wheels will lock-up.
NOTE:
The speed difference between front and real
wheels may light the ABS warning light, but thiz
indicates no malfunction. When the AT contro
diagnosis is finished, perform the ABS memoq
clearance procedure of on-board diagnostic:
system. <Ref. to ABS-22, Clear Memoq
Mode.>
5)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
. .
(B54) No. 16 (+)
-
Chassis ground (-):
(44) No. 7 (+)
-
Chassis ground (-):
CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Return the engine to idling speed and move
the select lever to "N".
2)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(854) No. 16 (+)
-
Chassis ground (-):
(B54)
No. 7 (+)
-
Chassis ground (-):
Check
j
the voltage more than 8.5 V?
s the voltage less than 0.5 V?
Yes
30 to step 7.
:veri if the AT OIL
rEMP warning
ights up, the cir-
:uit has returned
o a normal condi-
ion at this time. A
emporary poor
:ontact of the con-
lector or harness
nay be the cause.
3epair harness or
:onnector in TCM
and transmission.
AT-96