Subaru Legacy 2004 Service Manual page 2551

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
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. 15 — (B11) No. 13:
(B54) No. 12 — (B11) No. 9:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND CHASSIS GROUND.
Measure the resistance between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 15 — Chassis ground:
(B54) No. 12 — Chassis ground:
3 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 LC/B oil pressure SW.
4 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 3rd speed with checking current
gear position using Subaru Select Monitor.
4) Check input signal of LC/B 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 manual
mode 15 km/h (9 MPH) with checking current
gear position using Subaru Select Monitor.
4) Check input signal of LC/B oil pressure SW.
Check
Is the resistance less than 1
"?
Is the resistance more than 1
M"?
Is OFF displayed?
Is OFF displayed?
Is the ON displayed?
5AT(diag)-92
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. Replace the con-
trol valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
Even if the SPORT Go to step 6.
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