Subaru Legacy 2004 Service Manual page 2595

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK BODY INTEGRATED UNIT.
1) Connect the Subaru Select Monitor to data
link connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Read the DTC of body integrated unit using
Subaru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
2 CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever to "P" range.
2) Read the TIP mode SW data of body inte-
grated unit using Subaru Select Monitor. <Ref.
to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
3 CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever from "P" to "D" range.
2) Read the TIP mode SW data of body inte-
grated unit using Subaru Select Monitor. <Ref.
to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
4 CHECK BODY INTEGRATED UNIT INPUT
SIGNAL.
1) Shift the select lever to manual mode.
2) Shift the select lever to other than "D"
range.
3) Read the TIP mode SW data of body inte-
grated unit using Subaru Select Monitor. <Ref.
to LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
5 CHECK DTC OF TCM.
6 CHECK TCM INPUT SIGNAL.
1) Shift the select lever from "P" to "D" range.
2) Read the TIP mode SW data of TCM using
Subaru Select Monitor. <Ref. to 5AT(diag)-16,
OPERATION, Subaru Select Monitor.>
7 CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND SPORT SHIFT SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect harness connector from body
integrated unit and select lever.
3) Measure the harness resistance between
the body integrated unit and chassis ground.
Connector & terminal
(B281) No. 26 — Chassis ground:
8 CHECK SPORT SHIFT SWITCH.
1) Shift the select lever to "P" range.
2) Measure the resistance between harness
connector terminals of SPORT shift switch.
Terminals
(B116) No. 7 — No. 8:
Check
Is DTC displayed?
Is OFF displayed?
Is the indication on each range
OFF?
Is OFF displayed?
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
and AT CAN communication
circuit displayed?
Is the indication on each range
OFF?
Is the resistance more than 1
M"?
Is the resistance more than 1
M"?
5AT(diag)-136
Yes
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3. Go to step 7.
Go to step 4. Replace the select
lever assembly.
<Ref. to CS-7,
Select Lever.>
Go to step 5. Replace the select
lever assembly.
<Ref. to CS-7,
Select Lever.>
Perform the diag- Go to step 6.
nosis according to
each DTC.
Even if the SPORT Replace the TCM.
indicator lights <Ref. to 5AT-61,
blinks, the circuit is Transmission Con-
in normal condi- trol Module
tion. A temporary (TCM).>
poor contact of
connector or har-
ness may be the
cause.
Go to step 8. Repair the short
circuit of harness
between the body
integrated unit and
SPORT shift
switch.
Check the body Replace the select
integrated unit. lever assembly.
<Ref. to CS-7,
Select Lever.>
No