Subaru LEGACY 2006 Manual page 3446

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B55) No. 9 — (B11) No. 4:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and transmission ground.
Connector & terminal
(B55) No. 9 — Chassis ground:
3 CHECK LOW CLUTCH DUTY SOLENOID.
Measure the resistance between transmission
connector terminals.
Connector & terminal
(T4) No. 4 — No. 20:
4 CHECK OUTPUT SIGNAL FROM TCM US-
ING SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Connect the Subaru Select Monitor to the
data link connector.
3) Start the engine, and turn the Subaru
Select Monitor power switch ON.
4) Warm-up the transmission until the ATF
temperature reaches approximately 80°C
(176°F).
NOTE:
If the ambient temperature falls below 0°C
(32°F), drive the vehicle until the ATF reaches
its operating temperature.
5) Stop the engine and turn the ignition switch
to ON (with engine OFF).
6) Shift the select lever to "P" or "N" range,
and depress the accelerator pedal.
7) Read the data of "Low Clutch Duty Ratio"
using Subaru Select Monitor.
• Low clutch duty solenoid is indicated in "%."
5 CHECK OUTPUT SIGNAL FROM TCM US-
ING SUBARU SELECT MONITOR.
1) Turn the ignition switch to ON (engine
OFF).
2) Shift the select lever to "D" range.
3) Read the data of "Low Clutch Duty Ratio".
6 CHECK POOR CONTACT.
Check
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance between 2.0
— 6.0 Ω?
Is the measured value 100%? Go to step 5.
Is the measured value 0%?
Is there poor contact in low
clutch duty solenoid circuit?
4AT(diag)-60
Yes No
Go to step 2. Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Go to step 3. Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 4. Go to step 7.
Go to step 6.
Even if the SPORT Go to step 6.
indicator light is
blinking, the cir-
cuit is in normal
condition at this
time. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
harness or con-
nector in transmis-
sion.
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-62,
Transmission Con-
trol Module
(TCM).>