Subaru Legacy (2005 year). Manual - part 568

4AT(diag)-109

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

11

CHECK ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Perform the clear memory mode.
4) Perform the inspection mode.
5) Read the DTC.

Is the same DTC still dis-
played?

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

Go to step 12.

12

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

Step

Check

Yes

No

4AT(diag)-110

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AC:DTC P1761 LATERAL ACCELERATION SENSOR CIRCUIT LOW

DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK OUTPUT OF LATERAL G SENSOR 
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in 
Subaru Select Monitor.
2) Read the lateral G sensor output on Subaru 
Select Monitor display.

Is the value on display 2.3 — 
2.7 V when the lateral G sen-
sor is in horizontal position?

Go to step 2.

Go to step 5.

2

CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.

Is there poor contact in con-
nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 3.

AT-01496

11

B54

TCM

B359

1

2

3

9

2

2 3

1

B54

1 2

7

8 9

5

6

3

4

10 11 12

19 20 21

13 14 15 16

17 18

22 23 24

B359

G SENSOR

4AT(diag)-111

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

3

CHECK TCM.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.

Is the same DTC still dis-
played?

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

Go to step 4.

4

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

5

CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND 
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.

Connector & terminal

(B54) No. 2 — No. 9:

Is the resistance 5.0 — 6.0 
k

Ω?

Go to step 6.

Repair the har-
ness connector 
between lateral G 
sensor and TCM.

6

CHECK GROUND SHORT OF HARNESS.
Measure the resistance between TCM connec-
tor and chassis ground.

Connector & terminal

(B54) No. 9 — Chassis ground:

Is the resistance more than 1 
M

Ω?

Go to step 7.

Repair the har-
ness between lat-
eral G sensor and 
TCM.
Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

7

CHECK LATERAL G SENSOR.
1) Remove the console box.
2) Remove the lateral G sensor from vehicle.
3) Connect the connector to lateral G sensor.
4) Connect the connector to the TCM.
5) Turn the ignition switch to ON.
6) Measure the voltage between lateral G 
sensor connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 2.3 — 2.7 V 
when lateral G sensor is hori-
zontal?

Go to step 8.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

8

CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor 
connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 3.3 — 4.3 V 
when lateral G sensor is 
inclined to the right to 90

°?

Go to step 9.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

9

CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor 
connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 0.7 — 1.7 V 
when lateral G sensor is 
inclined to the left to 90

°?

Go to step 10.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

10

CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Perform the clear memory mode.
4) Perform the inspection mode.
5) Read the DTC.

Is the same DTC still dis-
played?

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

Go to step 11.

11

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

Step

Check

Yes

No

4AT(diag)-112

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AD:DTC P1762 LATERAL ACCELERATION SENSOR CIRCUIT HIGH

DTC DETECTING CONDITION:
Faulty lateral G sensor output voltage
WIRING DIAGRAM:

AT-01496

11

B54

TCM

B359

1

2

3

9

2

2 3

1

B54

1 2

7

8 9

5

6

3

4

10 11 12

19 20 21

13 14 15 16

17 18

22 23 24

B359

G SENSOR