Subaru IMPREZA 2002 Service Manual page 139

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
s the voltage between 0.4 and
I .8 V?
s
the value between 0.4 and
Step
CHECK INPUT SIGNAL FOR TCM.
1)Connect the connectors to TCM and ECM.
2)Start the engine, and warm-up the transmis-
sion until ATF temperature is above 80°C
(1 76°F).
NOTE:
If ambient temperature is below 0°C (32°F)
drive the vehicle until the ATF reaches its oper
ating temperature.
3)Engine idling.
4)Measure the voltage between TCM connec-
tor and chassis ground.
1
Connector & terminal
(854)
No. 1 (+)
-
Chassis ground (-):
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1)Connect the connectors to TCM and ECM.
2)Connect the Subaru Select Monitor to data
link connector.
3)Start the engine, and turn the Subaru Seleci
monitor switch to
ON.
4)Warm-up the engine until the engine coolani
temperature is above 80°C (176°F).
5)Engine idling.
6)Read the data of intake manifold pressure
signal using Subaru Select Monitor.
*Display shows the intake manifold pressure
signal value sent from ECM.
r
CHECK POOR CONTACT.
i
Yes
Even if the AT OIL
TEMP warning
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 harness or
connector in the
TCM and ECM.
Even if the AT OIL
s there poor contact in intake
nanifold pressure signal cir-
1.8 V?
Repair the poor
contact.
TEMP warning
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 harness or
connector in the
TCM and ECM.
No
;o to step 7.
30 to step 7.
3eplace the TCM.
:Ref. to AT-45,
rransmission Con-
rot Module
' T C M b
AT-47