Subaru Legacy 2004 Service Manual page 2538

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 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 harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 17 — (B11) No. 15:
(B55) No. 8 — (B11) No. 4:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure resistance of harness between TCM
connector and chassis ground.
Connector & terminal
(B54) No. 17 — Chassis ground:
(B55) No. 8 — Chassis ground:
3 PREPARE SUBARU SELECT MONITOR.
4 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check input signal of H&LR/C oil pressure
SW.
5 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Drive the vehicle on 2nd speed of "D" range
with checking current gear position using Sub-
aru Select Monitor.
4) Check input signal of H&LR/C oil pressure
SW.
6 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON. (engine ON)
3) Shift to "D" range and brake ON (1st) with
checking current gear position using Subaru
Select Monitor.
4) Check input signal of H&LR/C oil pressure
SW.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance less than 1
"?
Is the resistance more than 1
M"?
Do you have a Subaru Select
Monitor?
Is OFF displayed?
Is OFF displayed?
Is the ON displayed?
5AT(diag)-79
Yes
Go to step 2. Repair the open
circuit in harness
between TCM and
transmission con-
nector.
Go to step 3. Repair the short
circuit in harness
between TCM and
transmission con-
nector.
Go to step 4. Go to step 7.
Go to step 5. Go to step 11.
Go to step 6. Replace the con-
trol valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT Go to step 10.
indicator lights
blinks, the system
is in normal condi-
tion.
A temporary poor
contact of connec-
tor or harness may
be the cause.
Repair the poor
contact of har-
ness in the sole-
noid output and oil
pressure SW
input.
No