Subaru 2009 IMPREZA Service Manual page 2052

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
7 CHECK LOW & REVERSE BRAKE DUTY SO-
LENOID (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.
4) Disconnect the connector from the control
valve body.
5) Measure the resistance between low &
reverse duty solenoid connector and transmis-
sion ground.
Connector & terminal
(AT2) No. 1 — Transmission ground:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND LOW & REVERSE
DUTY SOLENOID.
Measure the resistance of harness between low
& reverse duty solenoid and transmission con-
nector.
Connector & terminal
(T4) No. 6 — (AT2) No. 1:
9 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND LOW & REVERSE
DUTY SOLENOID.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 6 — Transmission ground:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance 2.0 — 6.0 ? Go to step 8.
Is the resistance less than 1 ? Go to step 9.
Is the resistance 1 M or
more?
4AT(diag)-67
Yes No
Replace the con-
trol valve body.
<Ref. to 4AT-58,
Control Valve
Body.>
Repair open circuit
of harness
between low &
reverse duty sole-
noid and transmis-
sion connector.
Check the har- Repair the short
nesses or connec- circuit of the har-
tors between low & ness between the
reverse duty sole- low & reverse duty
noid and transmis- solenoid and the
sion, and repair the transmission con-
defective part. nector.