5AT(diag)-83
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
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:
Is the resistance less than 1
Ω?
Go to step 2.
Repair the open
circuit of harness
between TCM and
transmission con-
nector.
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:
Is the resistance more than 1
M
Ω?
Go to step 3.
Repair the short
circuit of harness
between TCM and
transmission con-
nector.
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.
Is OFF displayed?
Go to step 4.
Go to step 7.
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.
Is OFF displayed?
Go to step 5.
Replace the con-
trol valve body.
<Ref. to 5AT-58,
Control Valve
Body.>
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.
Is ON displayed?
Even if the SPORT
indicator lights
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair the
poor contact of
harness in the
solenoid output
and oil pressure
SW input.
Go to step 6.