Subaru 2002 IMPREZA Service Manual page 1670

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
6 CHECK POOR CONTACT.
7 CHECK 2-4 BRAKE TIMING SOLENOID (IN
TRANSMISSION).
1)Remove the transmission connector from
bracket.
2)Lift-up or raise the vehicle and support with
safety stand.
NOTE:
On AWD models, raise all wheels off ground.
3)Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
4)Remove the oil pan, and disconnect connec-
tor from 2-4 brake timing solenoid.
5)Measure the resistance between 2-4 brake
timing solenoid connector and transmission
ground.
Terminal
No. 1 — Transmission ground:
8 CHECK HARNESS CONNECTOR BETWEEN
2-4 BRAKE TIMING SOLENOID AND
TRANSMISSION.
Measure the resistance of harness between 2-
4 brake timing solenoid and transmission con-
nector.
Connector & terminal
(AT8) No. 1 — (T4) No. 4:
9 CHECK HARNESS CONNECTOR BETWEEN
2-4 BRAKE TIMING SOLENOID AND
TRANSMISSION.
Measure the resistance of harness between 2-
4 brake timing solenoid connector and trans-
mission ground.
Connector & terminal
(T4) No. 4 — Transmission ground:
Check
Is there poor contact in 2-4
brake timing solenoid circuit?
Is the resistance between 10
and 16 Ω?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
AT-84
Yes
Repair the poor Replace the TCM.
contact. <Ref. to AT-46,
Transmission Con-
trol Module
(TCM).>
Go to step 8. Replace the 2-4
brake timing sole-
noid. <Ref. to AT-
40, Shift Sole-
noids, Duty Sole-
noids and ATF
Temperature Sen-
sor.>
Go to step 9. Repair the open
circuit in harness
between 2-4 brake
timing solenoid
and transmission
connector.
Even if the Repair the short
POWER indicator circuit harness
lights up, the cir- between 2-4 brake
cuit has returned timing solenoid
to a normal condi- and transmission
tion at this time. A connector.
temporary poor
contact of the con-
nector or harness
may be the cause.
Repair the har-
ness or connector
in 2-4 brake tim-
ing solenoid and
transmission.
No