Subaru IMPREZA GD 2007 Series Manual page 2713

asieps_tobira_IM_US.book 74 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
5 CHECK OUTPUT SIGNAL FROM TCM US-
ING 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 illuminate the ABS warning light,
but this does not indicate a malfunction. When
AT control diagnosis is finished, perform the
ABS memory clearance procedure of on-board
diagnostics system. <Ref. to ABS(diag)-26,
Clear Memory Mode.>
6 CHECK HIGH CLUTCH DUTY SOLENOID (IN
TRANSMISSION).
1) Remove the transmission connector from
bracket.
2) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
3) Remove the oil pan, and disconnect the
connector from high clutch duty solenoid.
4) Measure the resistance between high clutch
duty solenoid connector and transmission
ground.
Connector & terminal
(AT12) No. 3 — Transmission ground:
7 CHECK HARNESS CONNECTOR BETWEEN
HIGH CLUTCH DUTY SOLENOID AND
TRANSMISSION.
Measure the resistance of harness between
high clutch duty solenoid and transmission con-
nector.
Connector & terminal
(T4) No. 7 — (AT12) No. 3:
8 CHECK HARNESS CONNECTOR BETWEEN
HIGH CLUTCH DUTY SOLENOID AND
TRANSMISSION.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 7 — Transmission ground:
Check
Is the measured value 100%?
Is the resistance 2.0 — 6.0 Ω? Go to step 7.
Is resistance less than 1 Ω?
Is the resistance 1 MΩ or
more?
4AT(D)(diag)-74
Yes No
Even if the ATF Repair the poor
temperature warn- contact.
ing light blinks, the
circuit 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 TCM and
transmission.
Replace the con-
trol valve body.
<Ref. to 4AT-59,
Control Valve
Body.>
Go to step 8.
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
Even if the ATF Repair the short
temperature warn- circuit of harness
ing light blinks, the between high
circuit is in normal clutch duty sole-
condition at this noid and transmis-
time. A temporary sion connector.
poor contact of
connector or har-
ness may be the
cause. Repair the
harness or con-
nector in high
clutch duty sole-
noid and transmis-
sion.