Subaru 2002 IMPREZA Service Manual page 1677

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
5 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Connect all connectors.
2)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.
3)Turn the ignition switch to ON (engine OFF).
4)Move the select lever to "N" range.
5)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 18 (+) — Chassis ground ( − − − − ):
6 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
Measure the voltage between TCM connector
and chassis ground.
Connector & terminal
(B54) No. 18 (+) — Chassis ground ( − − − − ):
7 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1)Connect all connectors.
2)Connect the Subaru Select Monitor to data
link connector.
3)Start the engine and turn Subaru Select
Monitor switch to ON.
4)Warm-up the transmission until ATF temper-
ature 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.
5)Stop the engine and turn ignition switch to
ON (engine OFF).
6)Move the select lever to "N" range.
7)Read the data of 2-4 brake duty solenoid
using Subaru Select Monitor.
•2-4 brake duty solenoid is indicated in "%".
8)Throttle is fully closed.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the voltage between 1.5 and
5.0 V with throttle fully closed?
Is the voltage less than 1 V
with throttle fully open?
Is the value 100 %?
AT-91
Yes
Go to step 6. Go to step 9.
Even if the Go to step 9.
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 8. Go to step 9.
No