Subaru IMPREZA 2002 Service Manual page 161

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
s the voltage between 1.2 and
i.8 V?
s
the value between 1.2 and
1.8 V?
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 the 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.
Connector & terminal
(855) No. 20 (+)
-
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 Select
monitor switch to ON.
4)Warm-up the engine until the engine coolant
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.
CHECK POOR CONTACT.
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
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
30 to step 7.
; o to step 7.
<Ref. to AT-45,
trol Module
%it? Transmission Con-
AT-69