Subaru Legacy 2005 Service Manual page 2248

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
4 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1) Connect the connectors to TCM and trans-
mission.
2) Lift-up the vehicle.
NOTE:
Raise all wheels off floor.
3) Connect the Subaru Select Monitor to data
link connector.
4) Start the engine, and turn the Subaru
Select Monitor power switch to 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 high clutch duty solenoid
using Subaru Select Monitor.
• High clutch duty solenoid is indicated in "%".
7) Shift the select lever to "D", and slowly
increase vehicle speed at 3rd or 4th to mea-
sure.
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light or VDC
warning light, but this indicates no malfunction.
When AT control diagnosis is finished, perform
the ABS memory clearance procedure or VDC
memory clearance procedure of on-board diag-
nostics system. <Ref. to ABS(diag)-26, Clear
Memory Mode.> <Ref. to VDC(diag)-25, Clear
Memory Mode.>
5 CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
Return the engine to idling speed and shift the
select lever to "N" range.
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light or VDC
warning light, but this indicates no malfunction.
When AT control diagnosis is finished, perform
the ABS memory clearance procedure or VDC
memory clearance procedure of on-board diag-
nostics system. <Ref. to ABS(diag)-26, Clear
Memory Mode.> <Ref. to VDC(diag)-25, Clear
Memory Mode.>
6 CHECK POOR CONTACT.
Check
Is the value 0%?
Is the value 100%?
Is there poor contact in high
clutch duty solenoid circuit?
4AT(diag)-76
Yes
Go to step 5. Go to step 6.
Even if the SPORT Go to step 6.
indicator light is
blinking, the cir-
cuit has returned
to normal condi-
tion at this time. A
temporary poor
contact of connec-
tor or harness may
be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
No