Subaru LEGACY 2006 Manual page 3441

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK DTC.
2 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 the harness
between TCM connector and transmission
connector.
Connector & terminal
(B55) No. 5 — (B11) No. 12:
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of the harness con-
nector between TCM connector and chassis
ground.
Connector & terminal
(B55) No. 5 — Chassis ground:
4 CHECK LOCK-UP DUTY SOLENOID.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) No. 12 — No. 20:
5 CHECK OUTPUT SIGNAL FROM TCM US-
ING SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Lift up the vehicle and support with rigid
racks.
NOTE:
Raise all wheels off the floor.
3) Connect the Subaru Select Monitor to the
data link connector.
4) Start the engine, and turn the Subaru
Select Monitor power switch ON.
5) Start the engine and warm-up the engine
until the ATF temperature exceeds 80°C
(176°F).
NOTE:
If the ambient temperature is below 0°C (32°F),
drive the vehicle until the ATF reaches its oper-
ating temperature.
6) Read the data of "Lock Up Duty Ratio"
using Subaru Select Monitor.
• Lock-up duty solenoid is indicated in "%."
7) Shift the select lever to "D", and slowly
increase vehicle speed to 60 km/h (37 MPH).
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
does not indicate a malfunction. When AT con-
trol diagnosis is finished, perform the ABS
memory clearance procedure of on-board diag-
nostics system. <Ref. to ABS(diag)-25, Clear
Memory Mode.>
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Do multiple DTCs appear in
the on-board diagnostics test
mode?
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 95%?
4AT(diag)-55
Yes No
Go to other DTC. Go to step 2.
Go to step 3.
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Go to step 4. Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 5. Go to step 8.
Go to step 6. Go to step 7.