Subaru Legacy (2005 year). Manual - part 635

5AT(diag)-131

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED MODULE AND MANU-
AL MODE SWITCH.
1) Disconnect the steering roll connector.
2) Measure the resistance of harness
between manual mode switch connector and
chassis ground.

Connector & terminal

(B116) No. 9 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 19.

Repair the short
circuit of harness
between manual
mode switch con-
nector and body
integrated module
connector.

CHECK INPUT SIGNAL TO BODY INTE-
GRATED MODULE.
1) Connect all the connectors.
2) Turn the ignition switch to ON. (engine
OFF)
3) Check the signal voltage for body inte-
grated module.

Connector & terminal

(B281) No. 25 (+) — Chassis ground (

−

Is the voltage more than 9 V?

Go to step 20.

Replace the body
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>

CHECK INPUT SIGNAL TO BODY INTE-
GRATED MODULE.
1) Shift and hold the select lever to up side.
2) Check the signal voltage for body inte-
grated module.

Connector & terminal

(B281) No. 25 (+) — Chassis ground (

−

Is the voltage less than 1 V?

Go to step 21.

Replace the body
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>

CHECK STEERING SHIFT SWITCH
GROUND CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from steering roll
connector.
3) Measure the resistance of harness
between steering roll connector and chassis
ground.

Connector & terminal

(ST4) No. 3 — Chassis ground:

Is the resistance less than 1
Ω?

Go to step 22.

Repair the open
circuit of harness
between steering
roll connector and
chassis ground.

CHECK STEERING SHIFT SWITCH.
Measure the resistance between steering roll
connector terminals.

Connector & terminal

(ST4) No. 3 — No. 4:

Is the resistance more than 1
M

Ω?

Go to step 23.

Replace the steer-
ing roll connector
or steering shift
switch. Or repair
the poor contact in
connector.

CHECK STEERING SHIFT SWITCH.
1) Press and hold the steering shift switch to +
side.
2) Measure the resistance between steering
shift switch terminals.

Connector & terminal

(ST4) No. 3 — No. 4:

Is the resistance less than 1
Ω?

Go to step 24.

Replace the steer-
ing roll connector
or steering shift
switch. Or repair
the poor contact in
connector.

CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED MODULE AND STEER-
ING ROLL CONNECTOR.
1) Disconnect the connector from body inte-
grated module.
2) Measure the resistance of harness
between body integrated module connector
and steering roll connector.

Connector & terminal

(B281) No. 15 — (B68) No. 2:

Is the resistance less than 1
Ω?

Go to step 25.

Repair the open
circuit of harness
between body inte-
grated module
connector and
steering roll con-
nector, or poor
contact in connec-
tor.

Step

Check

Yes

5AT(diag)-132

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

Connector & terminal

(B281) No. 25 — (B68) No. 7:

Is the resistance less than 1
Ω?

Go to step 26.

Repair the open
circuit of harness
between body inte-
grated module
connector and
steering roll con-
nector, or poor
contact in connec-
tor.

CHECK POOR CONTACT.

Is there poor contact in manual
mode switch circuit?

Repair the poor
contact.

A temporary poor
contact of manual
mode switch circuit
connector or har-
ness

Step

Check

Yes

5AT(diag)-133

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

B: CHECK SPORT INDICATOR LIGHT

DIAGNOSIS:
Output signal circuit of SPORT indicator light is open or shorted.
TROUBLE SYMPTOM:
• SPORT indicator light does not illuminate or remains illuminated.
• SPORT indicator light display does not change.
WIRING DIAGRAM:

AT-03177

i10

i77

A27

A26

B20

B30

i84

B280

TCM

B54

i10

i77

i84

B280

B54

3 4

6 7 8 9 10

22 23

34 35

17
30

18
31

MAIN SBF

SBF-6

No.5

COMBINATION
METER

SPORT
INDICATOR

JOINT
CONNECTOR

BODY INTEGRATED
MODULE

IGNITION

SWITCH

TTER

1 2

5 6

3 4

10 11 12
19 20 21

14 15

5AT(diag)-134

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

Step

Check

Yes

CHECK BODY INTEGRATED MODULE.
Check DTC of body integrated module.

Is DTC of AT CAN communica-
tion circuit displayed?

Perform the diag-
nosis according to
DTC.

Go to step 2.

CHECK TCM.
Check DTC of TCM.

Is DTC of AT CAN communica-
tion circuit displayed?

Perform the diag-
nosis according to
DTC.

Go to step 3.

CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor power
switch to ON.
5) Shift the select lever to manual mode side,
and then shift down the select lever.
6) Read the indicator.

Is gear position 1 and “

▲” dis-

played?

Go to step 4.

Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

CHECK TCM.
1) Shift up the select lever.
2) Read the indicator.

Is gear position 2 and “

▼” dis-

played?

Go to step 5.

Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>

CHECK BODY INTEGRATED MODULE.
Read the data of gear position using Subaru
Select Monitor.