Subaru Legacy 2002 Service Manual page 1856

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
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 the ATF reaches its
operating temperature.
3) Turn ignition switch to ON (engine OFF).
4) Move select lever to "N".
5) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B54) No. 18 (+) — Chassis ground (−):
6 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
Measure 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 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 tem-
perature is above 80°C (176°F).
NOTE:
If ambient temperature is below 0°C (32°F),
drive the vehicle until the ATF reaches its
operating temperature.
5) Stop the engine and turn ignition switch to
ON (engine OFF).
6) Move select lever to "N".
7) Read data of 2-4 brake duty solenoid using
Subaru Select Monitor.
¼ 2-4 brake duty solenoid is indicated in "%".
8) Throttle is fully closed.
Step
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-87
Automatic Transmission (Diagnostics)
Check Yes
Go to step 6.
Even if "POWER"
indicator lights up,
the circuit has
returned to a nor-
mal condition at
this time. A tem-
porary poor con-
tact of the con-
nector or harness
may be the
cause. Repair
harness or con-
nector in TCM
and transmission.
Go to step 8.
No
Go to step 9.
Go to step 9.
Go to step 9.